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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

A

128Hz

B

256Hz

C

284Hz

D

500Hz

Text Solution

Verified by Experts

The correct Answer is:
D
`n=(v)/(2(l_2-l_1)) = (340)/(2(0.84 - 0.50))`
`=(350)/(2[0.34]) = (34000)/(34xx2) = (1000)/(2) = 500Hz`
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