Question

A sound wave incident on a surface at an angle 40 degree to the normal to the point of incidence and produces an echo then the angle between the incident wave and the reflected wave is

Answer 1

Answer:

80 degrees

Explanation:

the angle i is given as 40 degrees.

since we know the angle i = angle r

angle r is also 40 degrees.

the question is of the degree formed between the incidence ray and the reflected ray. therefore, angle i+ angle r

40+40

=80

Answer 2

Answer:

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves.

Explanation: