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 velocity of sound is $340\ ms^{- 1}$, then the frequency of the turning fork is

Question

Dr. Abubacker · Accepted Answer

(d) From $v = 2\ n(l_{2} - l_{1})$
$n = \frac{v}{2\left( l_{2} - l_{1} ight)} = \frac{340}{2(0.84 - 0.50)}$
$= \frac{340}{2 	imes 0.34} = 500\ Hz$

Q. 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 velocity of sound is $340\ ms^{- 1}$, then the frequency of the turning fork is

Explanation

Reviewed by Dr. Abubacker

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