Question

if sound wave is allowed to fall normally on reflecting surface at what angle intensity of sound will maximum why

Answer 1

According to the law of reflection of sound, angle of incidence is equal to the angle of reflection.Here the sound falls normally to the reflecting surface( the angle of incidence is zero),hence angle of reflection would be zero and therefore the intensity of sound would be maximum at angle zero degree.

Answer 2

Answer:

at 90 degree the intensity will be maximum