Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves.‎Reflection of light · ‎Laws of reflection · ‎Retroreflection · ‎Other types of reflection. Reflection of Sound. The reflection of sound follows the law "angle of incidence equals angle of reflection", sometimes called the law of reflection. The same behavior is observed with light and other waves, and by the bounce of a billiard ball off the bank of a table. Reflected waves, also known as transmission line effects or standing waves, are over-voltages that can damage the motor and cable.


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Refraction of light at the interface between two media.

Reflection (physics)

Laws of reflection Main article: Specular reflection If the reflecting surface is very smooth, the reflection of light that occurs is called specular reflected wave regular reflection. The laws of reflection are as follows: The incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence lie in the same plane.

The angle which the incident ray makes with the normal is equal to the angle which the reflected ray makes to reflected wave same normal. The reflected ray and the incident ray are on the opposite sides of the normal.

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These three laws can all be derived from the Fresnel equations. Mechanism Play media 2D simulation: White blur represents the probability distribution of finding a particle in a given place if measured. In classical electrodynamicslight is considered as an electromagnetic wave, which reflected wave described by Maxwell's equations.

Light waves incident on a material induce small oscillations of polarisation in the reflected wave atoms or oscillation of electrons, in metalscausing each reflected wave to radiate a small secondary wave in all directions, like a dipole antenna.

All these waves add up to give specular reflection and refraction, according to the Huygens—Fresnel principle.

In the case of dielectrics such as glass, the electric field of the light acts on the electrons in the reflected wave, and the moving electrons generate fields and become new radiators.

The refracted light in the glass is the combination of the forward radiation of the electrons and the incident light. The reflected light is the reflected wave of the backward radiation of all of the electrons.


In reflected wave, electrons with no binding energy are called free electrons. Light—matter interaction in terms of photons is a topic of quantum electrodynamicsand is described in detail by Richard Feynman in his popular reflected wave QED: The Strange Theory of Light and Matter.

Reflected wave | Article about reflected wave by The Free Dictionary

Diffuse reflection Main article: Diffuse reflection When light strikes the surface of a non-metallic material it reflected wave off in all directions due to multiple reflections by the microscopic irregularities inside the material e. Thus, an 'image' is not formed. This is called diffuse reflection.

The exact form of reflected wave reflection depends on the structure of the material.

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One common model for diffuse reflection is Lambertian reflectancein which the light is reflected with equal luminance in photometry or radiance in radiometry in all reflected wave, as defined by Lambert's cosine law.

The light sent to our eyes by most of the objects we see is due to diffuse reflection reflected wave their surface, so that this is our primary mechanism of physical observation. Retroreflector Some surfaces exhibit retroreflection.

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