Corner reflector

Definition

A corner reflector is a device consisting of three mutually perpendicular, intersecting flat surfaces, which reflects waves back towards the source. It uses the principle of total internal reflection to achieve this effect.

5 Must Know Facts For Your Next Test

1. A corner reflector can reflect electromagnetic waves, such as light or radar waves, back to their source with high accuracy.
2. The principle of total internal reflection ensures that the incident wave is reflected multiple times within the reflector before returning.
3. Corner reflectors are commonly used in applications like radar systems, optical instruments, and even road signs.
4. The effectiveness of a corner reflector depends on the precision with which the surfaces are aligned at right angles.
5. Geometric optics principles, specifically the laws of reflection and refraction, are fundamental to understanding how corner reflectors work.

Related terms

Total Internal Reflection:

A phenomenon where a wave hitting a medium boundary at an angle greater than a particular critical angle is entirely reflected back into the original medium.

Law of Reflection:

$$\text{The law stating that when a wave encounters a reflective surface,} \, \text{the angle of incidence equals the angle of reflection.}$$

Retroreflector: $$\text{A device or surface that reflects waves back to their source with minimal scattering.}$$