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Two waves of frequencies 20 Hz and 30 Hz...

Two waves of frequencies 20 Hz and 30 Hz. Travels out from a common point. The phase difference between them after 0.6 sec is

A

Zero

B

`pi/2`

C

`pi`

D

`(3pi)/4`

Text Solution

Verified by Experts

The correct Answer is:
A
Beats period =`1/(30-20)=0.1` sec
`Deltaphi=(2pi)/T Delta.t=(2pi)/0.1 xx 0.6=2pixx6=12 pi`
or Zero
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