Q15 of 54 Page 390

In the bell jar experiment, as air is removed from the jar:

Sound requires medium to propagate. So, it faints as the air is removed from jar and its intensity decreases.

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13

An astronaut cannot hear his companion on the surface of the Moon because:

 14

The loudness of a sound depends upon:

 1

Write true of false for the following statements:

Sound waves are transverse whereas light waves are longitudinal in nature.

 2

Write true of false for the following statements:

Distance between a crest and the next trough in a wave motion is λ/4.