Question

the image below shows a sound wave emitted by a sound source that travels between two media. a vertical boundary exists between the two media. there are four marked locations a, b, c, and d. which letter identifies where the reflection wave would be after it interacts with the media boundary?

Explanation:

Step1: Recall reflection law

According to the law of reflection of waves, the angle of incidence equals the angle of reflection. The wave moving towards the boundary from the source will bounce back into the same medium.

Step2: Analyze options

Location A is in the same - medium as the source and is in the direction of the reflected wave according to the law of reflection. Location B is the incident wave direction, C and D are in the other medium (transmission, not reflection).

Answer:

A