An incident sound beam makes an angle of with the surface of a plane reflector

PHYSICS · Single correct · GCSE · Physics · Waves · Waves

Problem

An incident sound beam makes an angle of

70^{\circ}

with the surface of a plane reflector. Calculate the angle between the incident and the reflected beams. (a)

20^{\circ}

(b)

40^{\circ}

(c)

140^{\circ}

(d)

70^{\circ}