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In a resonance tube experiment the diffe...

In a resonance tube experiment the difference between the first and second resonating lengths is 15 cm.Then the wavelength of the sound wave is

A

15 cm

B

20 cm

C

25 cm

D

30 cm

Text Solution

Verified by Experts

The correct Answer is:
D
The first and second resonating lengths are at `lambda/4 " and " (3 lambda)/4`.
`:. DeltaL = l_(2) - l_(1) = (3 lambda)/4 - lambda/4 = lambda/2`
` :. 15 = lambda/2 :. lambda = 30 ` cm
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