What is Reflection?

And how does it relate to light.

Reflection

Reflection is the throwing back by a body or surface of light, heat, or sound without absorbing it.

How does it relate to light?

    In both cases the angle of incidence equals the angle of reflection at the point that the light ray strikes the surface. Light is also reflected when it is incident on a surface or interface between two different materials such as the surface between air and water, or glass and water.

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AQA GCSE Core Science and P1 - reflection