Q62 of 199 Page 208

What is meant by ‘reflection of sound’? What type of surface are the best reflecting sound?

when after heating a hard surface sound bounce back, this is known as reflection of sound. Hard solid surface is best for reflection of sound.


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60

The echo of a sound is heard after 5 seconds. If the speed of sound in air be 343 m/s, calculate the distance of the reflecting surface.

 61

The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo?

 62

Name any two objects which are good reflectors of sound.

 62

State the laws of reflection of sound.