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A plane electromagnetic wave travels in ...

A plane electromagnetic wave travels in vacuum along z-direction. If the frequency of the wave is 40 MHz then its wavelength is

A

5 m

B

7.5 m

C

8.5 m

D

10 m

Text Solution

Verified by Experts

The correct Answer is:
B
Wavelength, `lambda=(c)/(upsilon)=(3xx10^(8)"m s"^(-1))/(40xx10^(6)s^(-1))=7.5m`
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