Question

While verifying the laws of reflection of sound, Sumit measured the angle
between the incident sound and the reflected sound equals to 130°. What
will be the angle of incidence of the sound wave?​

Answer 1

Answer:

x=25

Explanation:

Since the normal makes an angle of 90 with the plain.

Therefore,

Let angle between incident ray and plain be X.

=> angle of incidence=(90-X)

=> angle of refraction=(90-X)

According to question:

90-x+ 90-x=130

=>180-2x=130

=>2x=50

=x=25