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Two waves of frequencies 30 Hz and 40 Hz...

Two waves of frequencies 30 Hz and 40 Hz travel out from a common point. How they will differ in phase at the end of 0.95 s

A

`2pi` radian

B

`19 pi` radian

C

10 radian

D

`20pi` radian

Text Solution

Verified by Experts

The correct Answer is:
B
`delta phi = (omega_(2) - omega_(1)) t`
`= 2pi (n_(2) - n_(1)) t`
`= 2pi (40 - 30) xx 0.95 = 2pi xx 10 xx 0.95`
`= 19pi`
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