Question

Define Reflection and Refraction? What is the cause of refraction?​

Answer 1

Answer:

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Answer 2

Answer:

The angle of incidence equals the angle of reflection. Refraction is the change of the propagation direction of waves when they pass into a medium where they have a different speed. It happens whenever the waves are incident to the surface at an angle different to the normal to the surface.

Explanation:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction.