# Application Of Reflection In Physics

10th Class Physics Ch 12 Application Total Internal. 7/8/2012 · Physics Form 5: Chapter 1 - Application of Destructive Interference. Physics Form 5: Chapter 1 - Application of Reflection of Sound Echoes are caused by the reflection of sound. A sound wave will continue to bounce around or reverberate until it has lost all its energy. A wave has some of its energy absorbed by the objects it hits., The law of reflection is illustrated in , which also shows how the angles are measured relative to the perpendicular to the surface at the point where the light ray strikes. We expect to see reflections from smooth surfaces, but [link] illustrates how a rough surface reflects light..

### Reflection and refraction AQA - Revision 1 - GCSE

Optics Physics Apps on Google Play. Journal of Physics: Conference Series PAPER OPEN ACCESS An Implementation Of Icare Approach (Introduction, Connection, Application, Reflection, Extension) to Improve The Creative Thinking Skills To cite this article: Carni et al 2017 J. Phys.: Conf. Ser. 812 012022 View the article online for updates and enhancements. Related content, 3/16/2017 · Filed Under: Physics Tagged With: application of reflection, Application of Reflection of Light, Application of Reflection of Light in Daily Life, Application of Reflection of Light in the Construction of Devices, Explain Uses of Refraction in our Daily Life, Give 5 examples of refraction of light in daily life, Reflection, Reflection Of Light.

The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3). There are far more occurrences of Physics / Reflection of Light at Plane surfaces. The branch of physics dealing with the properties and behaviour of light is called optics. Light is a form of energy which helps us to see the objects. Have you ever wondered why we are able to see the different objects around us, their images in a mirror or in a pond? This is simply due to

total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application 10/13/2017 · This application for optics is a pocket dictionary of all optical characteristics and its analysis with formulas to find various parameters. This helps learner’s to study Reflection, Laws of reflection, Spherical Mirrors, Formation of image by a spherical mirror, Relation between focal length and radius of curvature, Law of distances-Mirror Equation, Magnification, Linear magnification

Journal of Physics: Conference Series PAPER OPEN ACCESS An Implementation Of Icare Approach (Introduction, Connection, Application, Reflection, Extension) to Improve The Creative Thinking Skills To cite this article: Carni et al 2017 J. Phys.: Conf. Ser. 812 012022 View the article online for updates and enhancements. Related content Reflection and refraction All waves will reflect and refract in the right circumstances. The reflection and refraction of light explains how people see images, colour and even optical illusions.

Spherical Mirror Application - Light Reflection & Refraction, CBSE Class 10 Physics video for Class 10 is made by best teachers who have written some of the best books of Class 10. total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application

The law of reflection is illustrated in, which also shows how the angles are measured relative to the perpendicular to the surface at the point where the light ray strikes. The law of reflection is very simple: The angle of reflection equals the angle of incidence. 7/8/2012 · Physics Form 5: Chapter 1 - Application of Destructive Interference. Physics Form 5: Chapter 1 - Application of Reflection of Sound Echoes are caused by the reflection of sound. A sound wave will continue to bounce around or reverberate until it has lost all its energy. A wave has some of its energy absorbed by the objects it hits.

12/17/2012 · The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.In fact, reflection of light may occur whenever light travels from a medium of a given refractive index into a medium with a different refractive index. 1/31/2017 · Reflection is everywhere Reflection of lights from the objects gives us the opportunity to view things. Basically, common notion follows that reflection happens with help of mirrors only. But it happens everywhere, the light bounces off the object...

The law of reflection is illustrated in, which also shows how the angles are measured relative to the perpendicular to the surface at the point where the light ray strikes. The law of reflection is very simple: The angle of reflection equals the angle of incidence. Sound - Sound - Refraction: Diffraction involves the bending or spreading out of a sound wave in a single medium, in which the speed of sound is constant. Another important case in which sound waves bend or spread out is called refraction. This phenomenon involves the bending of a sound wave owing to changes in the wave’s speed. Refraction is the reason why ocean waves approach a shore

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, Reflection is where light bounces off shiny, reflective surface. Refraction is where light bends when it moves from one medium to another. Light bounces in a particular way, and it bends in a

### Total Internal Reflection Physics

Optics. A Tutorial on The Basics of Reflection: Notes, Figures and Problems with Solutions. Target Audience: High School Students, College Freshmen and Sophomores, students preparing for the International Baccalaureate (IB), AP Physics B, AP Physics C, A Level, Singapore/GCE A-Level;, OPTICS Optic is one of the branch of physics which deals with the light and properties of it. We know that light shows both the particle and wave characteristics. However, in this unit we will learn the particle characteristics of the light. Some of the topics will be covered in this unit are; reflection and refraction of light, plane mirrors, concave and convex mirrors, reflection of light.

### Total Internal Reflection Mini Physics Learn Physics

Physics Light Reflection & Refraction part 8 (Spherical. Medical physics is the use of physics in medicine. One of the best examples of the application of physics to medicine is the use of magnetic resonance in an MRI scan. https://it.wikipedia.org/wiki/Microscopio_a_fluorescenza The concept of reflection of sound is familiar to everyone. Let’s understand this by a small activity. If we take two tubes and position them against a wall, as shown in the figure below, upon placing a speaker or any other source of sound near one end of the tube, we receive the sound at the end of the other tube..

Total internal reflection refers to the complete reflection of a ray of light within an optically-denser medium from the surrounding surfaces of optically less dense media back into the denser medium.. Light ray travel from an optically denser medium to a less dense medium. The angle of incidence must be greater than a certain angle, called the critical angle. The effect of both reflection and refraction is to change the direction of the independent waves that are emitted by the point sources. The results of the rigorous calculations are identical to what is obtained from Newton's geometric optics (such as Snell's law of refraction), which was derived under a particle principle of light—although Newton's method is less elegant in its explanation

Total Internal Reflection (TIR) is the phenomenon that makes the water-to-air surface in a fish-tank look like a perfectly silvered mirror when viewed from below the water level (Fig. 1).Technically, TIR is the total reflection of a wave incident at a sufficiently oblique angle on the interface between two media, of which the second ("external") medium is transparent to such waves but has a Spherical Mirror Application - Light Reflection & Refraction, CBSE Class 10 Physics video for Class 10 is made by best teachers who have written some of the best books of Class 10.

When the angle of incidence becomes larger than the critical angle, no refraction occurs. The entire light is reflected back into the denser medium. This is known as total internal reflection of light.Optical fibers,prisms,endoscope,periscope are some applications of total internal reflection. The law of reflection is illustrated in , which also shows how the angles are measured relative to the perpendicular to the surface at the point where the light ray strikes. We expect to see reflections from smooth surfaces, but [link] illustrates how a rough surface reflects light.

The concept of reflection of sound is familiar to everyone. Let’s understand this by a small activity. If we take two tubes and position them against a wall, as shown in the figure below, upon placing a speaker or any other source of sound near one end of the tube, we receive the sound at the end of the other tube. Reflection of Light Rays on a Reflecting Surface. When a light ray strikes a surface separating two media with different optical properties, part of the light energy is reflected back to the media where it coming from. When light strikes a perfectly reflecting surface, such …

The observation of photosensitivity in Ge‐doped core optical fibers is reported. The photosensitivity is manifested by light‐induced refractive‐index changes in the core of the waveguide. Narrowband reflectors in a guide structure have been fabricated using this photosensitivity and the resulting DFB reflectors employed as laser mirrors in a cw gas laser in the visible. The law of reflection is illustrated in, which also shows how the angles are measured relative to the perpendicular to the surface at the point where the light ray strikes. The law of reflection is very simple: The angle of reflection equals the angle of incidence.

However, this is a field description of reflection. As QED proposes a microscale field solution, its description must replace field reflection, not rely on it. In other words its summation of multiple paths is meant to produce the observed field properties, it therefore cannot use … The concept of reflection of sound is familiar to everyone. Let’s understand this by a small activity. If we take two tubes and position them against a wall, as shown in the figure below, upon placing a speaker or any other source of sound near one end of the tube, we receive the sound at the end of the other tube.

10/5/2019 · There are two types of reflection of light, regular reflection and irregular reflection. Light reflected from mirror is an example of a reflection of light. Reflection of light Examples in daily life. Reflection of light enables us to see. We see colors of different objects due to reflection. We see nonluminous objects due to the reflection of 8/9/2017 · But with reflection, your code can view the object and find out if it has the “doSomething” method. In addition, you can call it if necessary. With reflection in C#, you can dynamically create an instance of a type and bind that type to an existing object. Moreover, you can get the type from an existing object and access its properties.

Total internal reflection is the complete reflection of light through a more dense medium to a less dense medium. Example of total internal reflection is light travelling from glass to air. Total internal reflection finds application in optical fibers. total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application

## Physics for O-Level Reflection of Waves

Photosensitivity in optical fiber waveguides Application. total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application, A Tutorial on The Basics of Reflection: Notes, Figures and Problems with Solutions. Target Audience: High School Students, College Freshmen and Sophomores, students preparing for the International Baccalaureate (IB), AP Physics B, AP Physics C, A Level, Singapore/GCE A-Level;.

### Sound Refraction Britannica

Sound Refraction Britannica. 4/16/2013 · Physics Light Reflection & Refraction part 8 (Spherical Mirror Application) CBSE class 10 X., 8/12/2017 · Applications of Total Internal Reflection of Light: The phenomenon of total internal reflection of light is used in many optical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes etc. The brilliance of a diamond is due to total internal reflection. Optical fibre works on the principle of total internal reflection..

However, this is a field description of reflection. As QED proposes a microscale field solution, its description must replace field reflection, not rely on it. In other words its summation of multiple paths is meant to produce the observed field properties, it therefore cannot use … 10/5/2019 · There are two types of reflection of light, regular reflection and irregular reflection. Light reflected from mirror is an example of a reflection of light. Reflection of light Examples in daily life. Reflection of light enables us to see. We see colors of different objects due to reflection. We see nonluminous objects due to the reflection of

The observation of photosensitivity in Ge‐doped core optical fibers is reported. The photosensitivity is manifested by light‐induced refractive‐index changes in the core of the waveguide. Narrowband reflectors in a guide structure have been fabricated using this photosensitivity and the resulting DFB reflectors employed as laser mirrors in a cw gas laser in the visible. When the angle of incidence becomes larger than the critical angle, no refraction occurs. The entire light is reflected back into the denser medium. This is known as total internal reflection of light.Optical fibers,prisms,endoscope,periscope are some applications of total internal reflection.

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, Journal of Physics: Conference Series PAPER OPEN ACCESS An Implementation Of Icare Approach (Introduction, Connection, Application, Reflection, Extension) to Improve The Creative Thinking Skills To cite this article: Carni et al 2017 J. Phys.: Conf. Ser. 812 012022 View the article online for updates and enhancements. Related content

total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application 1/31/2017 · Reflection is everywhere Reflection of lights from the objects gives us the opportunity to view things. Basically, common notion follows that reflection happens with help of mirrors only. But it happens everywhere, the light bounces off the object...

This discussion on Application of reflection of sound? is done on EduRev Study Group by Class 9 Students. Sound - Sound - Refraction: Diffraction involves the bending or spreading out of a sound wave in a single medium, in which the speed of sound is constant. Another important case in which sound waves bend or spread out is called refraction. This phenomenon involves the bending of a sound wave owing to changes in the wave’s speed. Refraction is the reason why ocean waves approach a shore

A Tutorial on The Basics of Reflection: Notes, Figures and Problems with Solutions. Target Audience: High School Students, College Freshmen and Sophomores, students preparing for the International Baccalaureate (IB), AP Physics B, AP Physics C, A Level, Singapore/GCE A-Level; 3/16/2017 · Filed Under: Physics Tagged With: application of reflection, Application of Reflection of Light, Application of Reflection of Light in Daily Life, Application of Reflection of Light in the Construction of Devices, Explain Uses of Refraction in our Daily Life, Give 5 examples of refraction of light in daily life, Reflection, Reflection Of Light

8/9/2017 · But with reflection, your code can view the object and find out if it has the “doSomething” method. In addition, you can call it if necessary. With reflection in C#, you can dynamically create an instance of a type and bind that type to an existing object. Moreover, you can get the type from an existing object and access its properties. Medical physics is the use of physics in medicine. One of the best examples of the application of physics to medicine is the use of magnetic resonance in an MRI scan.

Total Internal Reflection (TIR) is the phenomenon that makes the water-to-air surface in a fish-tank look like a perfectly silvered mirror when viewed from below the water level (Fig. 1).Technically, TIR is the total reflection of a wave incident at a sufficiently oblique angle on the interface between two media, of which the second ("external") medium is transparent to such waves but has a total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application

10/5/2019 · There are two types of reflection of light, regular reflection and irregular reflection. Light reflected from mirror is an example of a reflection of light. Reflection of light Examples in daily life. Reflection of light enables us to see. We see colors of different objects due to reflection. We see nonluminous objects due to the reflection of OPTICS Optic is one of the branch of physics which deals with the light and properties of it. We know that light shows both the particle and wave characteristics. However, in this unit we will learn the particle characteristics of the light. Some of the topics will be covered in this unit are; reflection and refraction of light, plane mirrors, concave and convex mirrors, reflection of light

Spherical Mirror Application - Light Reflection & Refraction, CBSE Class 10 Physics video for Class 10 is made by best teachers who have written some of the best books of Class 10. Total internal reflection refers to the complete reflection of a ray of light within an optically-denser medium from the surrounding surfaces of optically less dense media back into the denser medium.. Light ray travel from an optically denser medium to a less dense medium. The angle of incidence must be greater than a certain angle, called the critical angle.

Total Internal Reflection (TIR) is the phenomenon that makes the water-to-air surface in a fish-tank look like a perfectly silvered mirror when viewed from below the water level (Fig. 1).Technically, TIR is the total reflection of a wave incident at a sufficiently oblique angle on the interface between two media, of which the second ("external") medium is transparent to such waves but has a Reflection occurs when all or part of the waves are returned when the waves encounter or hit an obstacle. 2. When waves are reflected, their direction of travel changes. (SPM Physics: 2010 Paper 1, Q32 at pg. 238) 3. Since, upon reflection, waves direction changes, velocity of the waves therefore changes too.

Reflection occurs when all or part of the waves are returned when the waves encounter or hit an obstacle. 2. When waves are reflected, their direction of travel changes. (SPM Physics: 2010 Paper 1, Q32 at pg. 238) 3. Since, upon reflection, waves direction changes, velocity of the waves therefore changes too. Reflection occurs when all or part of the waves are returned when the waves encounter or hit an obstacle. 2. When waves are reflected, their direction of travel changes. (SPM Physics: 2010 Paper 1, Q32 at pg. 238) 3. Since, upon reflection, waves direction changes, velocity of the waves therefore changes too.

The law of reflection is illustrated in , which also shows how the angles are measured relative to the perpendicular to the surface at the point where the light ray strikes. We expect to see reflections from smooth surfaces, but [link] illustrates how a rough surface reflects light. Reflection is where light bounces off shiny, reflective surface. Refraction is where light bends when it moves from one medium to another. Light bounces in a particular way, and it bends in a

### Photosensitivity in optical fiber waveguides Application

What are daily examples of reflection? Quora. 8/9/2017 · But with reflection, your code can view the object and find out if it has the “doSomething” method. In addition, you can call it if necessary. With reflection in C#, you can dynamically create an instance of a type and bind that type to an existing object. Moreover, you can get the type from an existing object and access its properties., Reflection of Light Rays on a Reflecting Surface. When a light ray strikes a surface separating two media with different optical properties, part of the light energy is reflected back to the media where it coming from. When light strikes a perfectly reflecting surface, such ….

### Light The Basics of Reflection Some Interesting Problems

10th Class Physics Ch 12 Application Total Internal. Journal of Physics: Conference Series PAPER OPEN ACCESS An Implementation Of Icare Approach (Introduction, Connection, Application, Reflection, Extension) to Improve The Creative Thinking Skills To cite this article: Carni et al 2017 J. Phys.: Conf. Ser. 812 012022 View the article online for updates and enhancements. Related content https://en.m.wikipedia.org/wiki/Category:Scattering_theory Total internal reflection is the complete reflection of light through a more dense medium to a less dense medium. Example of total internal reflection is light travelling from glass to air. Total internal reflection finds application in optical fibers..

Application of reflection of sound? Unanswered Questions. How long does it take Bruce Wayne to get into his Batsuit? Which is the best replica jewelry website? Asked in Physics When the angle of incidence becomes larger than the critical angle, no refraction occurs. The entire light is reflected back into the denser medium. This is known as total internal reflection of light.Optical fibers,prisms,endoscope,periscope are some applications of total internal reflection.

Reflection occurs when all or part of the waves are returned when the waves encounter or hit an obstacle. 2. When waves are reflected, their direction of travel changes. (SPM Physics: 2010 Paper 1, Q32 at pg. 238) 3. Since, upon reflection, waves direction changes, velocity of the waves therefore changes too. You can also use reflection to create type instances at run time, and to invoke and access them. For topics about specific aspects of reflection, see Related Topics at the end of this overview. The common language runtime loader manages application domains, which constitute defined boundaries around objects that have the same application scope

Application of Light. Show/Hide Sub-topics (O Level) Usage of light in optical fibres, in medical uses and telecommunications. Endoscopes are used to get the images of hollow organs by sending a beam of light through optical fibres. In an endoscope there are two bundles of very narrow optical fibres. Administrator of Mini Physics. If you Physics / Reflection of Light at Plane surfaces. The branch of physics dealing with the properties and behaviour of light is called optics. Light is a form of energy which helps us to see the objects. Have you ever wondered why we are able to see the different objects around us, their images in a mirror or in a pond? This is simply due to

You can also use reflection to create type instances at run time, and to invoke and access them. For topics about specific aspects of reflection, see Related Topics at the end of this overview. The common language runtime loader manages application domains, which constitute defined boundaries around objects that have the same application scope The observation of photosensitivity in Ge‐doped core optical fibers is reported. The photosensitivity is manifested by light‐induced refractive‐index changes in the core of the waveguide. Narrowband reflectors in a guide structure have been fabricated using this photosensitivity and the resulting DFB reflectors employed as laser mirrors in a cw gas laser in the visible.

Application of Light. Show/Hide Sub-topics (O Level) Usage of light in optical fibres, in medical uses and telecommunications. Endoscopes are used to get the images of hollow organs by sending a beam of light through optical fibres. In an endoscope there are two bundles of very narrow optical fibres. Administrator of Mini Physics. If you Since total internal reflection takes place within the fibers, no incident energy is ever lost due to the transmission of light across the boundary. The intensity of the signal remains constant. Another common Physics demonstration involves the use of a large jug filled with water and a laser beam.

8/12/2017 · Applications of Total Internal Reflection of Light: The phenomenon of total internal reflection of light is used in many optical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes etc. The brilliance of a diamond is due to total internal reflection. Optical fibre works on the principle of total internal reflection. Since total internal reflection takes place within the fibers, no incident energy is ever lost due to the transmission of light across the boundary. The intensity of the signal remains constant. Another common Physics demonstration involves the use of a large jug filled with water and a laser beam.

Reflection occurs when all or part of the waves are returned when the waves encounter or hit an obstacle. 2. When waves are reflected, their direction of travel changes. (SPM Physics: 2010 Paper 1, Q32 at pg. 238) 3. Since, upon reflection, waves direction changes, velocity of the waves therefore changes too. 7/8/2012 · Physics Form 5: Chapter 1 - Application of Destructive Interference. Physics Form 5: Chapter 1 - Application of Reflection of Sound Echoes are caused by the reflection of sound. A sound wave will continue to bounce around or reverberate until it has lost all its energy. A wave has some of its energy absorbed by the objects it hits.

A Tutorial on The Basics of Reflection: Notes, Figures and Problems with Solutions. Target Audience: High School Students, College Freshmen and Sophomores, students preparing for the International Baccalaureate (IB), AP Physics B, AP Physics C, A Level, Singapore/GCE A-Level; The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3). There are far more occurrences of

Sound - Sound - Refraction: Diffraction involves the bending or spreading out of a sound wave in a single medium, in which the speed of sound is constant. Another important case in which sound waves bend or spread out is called refraction. This phenomenon involves the bending of a sound wave owing to changes in the wave’s speed. Refraction is the reason why ocean waves approach a shore The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3). There are far more occurrences of

Total internal reflection refers to the complete reflection of a ray of light within an optically-denser medium from the surrounding surfaces of optically less dense media back into the denser medium.. Light ray travel from an optically denser medium to a less dense medium. The angle of incidence must be greater than a certain angle, called the critical angle. 3/16/2017 · Filed Under: Physics Tagged With: application of reflection, Application of Reflection of Light, Application of Reflection of Light in Daily Life, Application of Reflection of Light in the Construction of Devices, Explain Uses of Refraction in our Daily Life, Give 5 examples of refraction of light in daily life, Reflection, Reflection Of Light

total internal reflection conditions total internal reflection experiment total internal reflection critical angle total internal reflection definition Application Reflection occurs when all or part of the waves are returned when the waves encounter or hit an obstacle. 2. When waves are reflected, their direction of travel changes. (SPM Physics: 2010 Paper 1, Q32 at pg. 238) 3. Since, upon reflection, waves direction changes, velocity of the waves therefore changes too.

Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, Since total internal reflection takes place within the fibers, no incident energy is ever lost due to the transmission of light across the boundary. The intensity of the signal remains constant. Another common Physics demonstration involves the use of a large jug filled with water and a laser beam.

3/16/2017 · Filed Under: Physics Tagged With: application of reflection, Application of Reflection of Light, Application of Reflection of Light in Daily Life, Application of Reflection of Light in the Construction of Devices, Explain Uses of Refraction in our Daily Life, Give 5 examples of refraction of light in daily life, Reflection, Reflection Of Light 8/12/2017 · Applications of Total Internal Reflection of Light: The phenomenon of total internal reflection of light is used in many optical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes etc. The brilliance of a diamond is due to total internal reflection. Optical fibre works on the principle of total internal reflection.

Spherical Mirror Application - Light Reflection & Refraction, CBSE Class 10 Physics video for Class 10 is made by best teachers who have written some of the best books of Class 10. Spherical Mirror Application - Light Reflection & Refraction, CBSE Class 10 Physics video for Class 10 is made by best teachers who have written some of the best books of Class 10.

Total internal reflection refers to the complete reflection of a ray of light within an optically-denser medium from the surrounding surfaces of optically less dense media back into the denser medium.. Light ray travel from an optically denser medium to a less dense medium. The angle of incidence must be greater than a certain angle, called the critical angle. Sound - Sound - Refraction: Diffraction involves the bending or spreading out of a sound wave in a single medium, in which the speed of sound is constant. Another important case in which sound waves bend or spread out is called refraction. This phenomenon involves the bending of a sound wave owing to changes in the wave’s speed. Refraction is the reason why ocean waves approach a shore