A long glass tube is held vertically in ...

A long glass tube is held vertically in water . A tuning fork is struck and held over the tube . Strong resonances are observed at two successive lengths `0.50 m and 0.84 m` above the surface of water . If the velocity of sound is `340 m//s`, then the frequency of the tuning fork is

125 Hz

256 Hz

500 Hz

750 Hz

Text Solution

Verified by Experts

The correct Answer is:

`lambda = 2[l_(2) - l_(1)] = 68` cm
` :. n = V/lambda = (340 xx 100)/68=500` Hz

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