Q45 of 199 Page 186

Explain why, the flash of lightning reaches us first and the sound of thunder is heard a little later.

The flash of lightning reaches us first and the sound of thunder is heard a little later, this happens because the speed of light is faster in air then that of the speed of sound.


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43

Are sound waves longitudinal or transverse?

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A cricket ball is seen to hit the bat first and the sound of hitting is heard a little later. Why?

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Explain why, the flash of a gun shot reaches us before the sound of the gun shot.

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Which of the following terms apply to sound waves in air and which to water waves?

Transverse, Rarefaction, Trough, Crest, Compression, Longitudinal