Question

What happens to a wave when it reaches the boundary between two media.

Answer 1

Answer:

When a wave reaches a boundary between two media, usually some or all of the wave bounces back into the first medium. The return of a wave back into its original medium is called reflection. ... When light is incident on a rough surface, light is reflected in many directions.

Explanation:

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Answer 2

Usually when a wave reaches a boundary between two media it means some or all of the wave bounces back into the first medium, which is called reflection.