Q62 of 199 Page 208

Name any two objects which are good reflectors of sound.

metal sheet and hard wood are good reflector of sound.


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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

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

 62

State the laws of reflection of sound.

 63

What is an echo? How is echo formed?