(a) What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?

(b) Name any two objects which are good reflectors of sound.

(c) State the laws of reflection of sound.

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Solution

(a) The bouncing back of sound wave is called reflection. Hard surfaces are the best reflection surfaces

(b) Walls, cliffs

(c) The laws of reflection of sound are -

(1) The incident wave, reflected wave and the normal all lie in the same plane.

(2) The angle of incidence = angle of reflection

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