Question

During reflection of a sound on a plain surface if sound makes an angle of 47° with normal then angle of reflection of sound will be? (i) 46° (ii) 47° (iii) 94° (iv) 74°

Answer 1

I think if it's a reflection then surely the angle of reflection of sound will be 47° as mentioned in the question

Answer 2

Sound is a form of energy which gives us sensation of hearing.

During Reflection, Sound obeys laws of reflection :

1. Angle of incidence and angle of reflection are equal.
2. Incident ray, reflected ray and normal at the point of incidence, all lie on the same plane.

Hence: option ii
If Incident angle is 47 ° then According to laws of reflection, angle of reflection is 47