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The wave function for an electromagnetic...

The wave function for an electromagnetic wave is `phi(x, t)=10^2 sin 3xx 10^6 pi(x-3 xx 10^8t).` Then frequency of the wave is

A

`4.5 xx 10^(14)Hz`

B

`4.5 xx 10^(13)Hz`

C

`4.5 xx 10^(9)Hz`

D

`4.5 xx 10^(6)Hz`

Text Solution

Verified by Experts

The correct Answer is:
A
`phi (x,t)=10^(3) sin 3 xx 10^(6) pi (x-3 xx 10^8 t)`
Comparing it with `Psi(x,t)=a sin ""(2pi)/lambda (x-vt)`
`(2pi)/(lambda)=3 xx 10^(6) pi, lambda=666nm " "f=(3 xx 10^(8))/(666 xx 10^(-9))=4.5 xx 10^(14)Hz`
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