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Question

Physics Question on Waves

A closed organ pipe and an open pipe of the same length produce 4 beats when they are set into vibrations simultaneously. If he length of each of them were twice their initial lengths, the number of beats produced will be

A

2

B

4

C

1

D

8

Answer

2

Explanation

Solution

Δn1=ν2l−ν4l;Δn2=ν4l−ν8l\Delta n_1 = \frac{\nu}{2l} - \frac{\nu}{4l} ; \Delta n_2 = \frac{\nu}{4l} - \frac{\nu}{8l}