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A plane electromagnetic wave of frequenc...

A plane electromagnetic wave of frequency `40 MHz` travels in free space in the `X`-direction. At some point and at some instant, the electric field `vecE` has its maximum value of `750 N//C` in `Y`- direction. The wavelength of the wave is-

A

`3.5 m`

B

`5.5 m`

C

`7.5 m`

D

`9.5 m`

Text Solution

Verified by Experts

The correct Answer is:
C
`lambda=(C )/(f)=(3xx10^(8))/(4xx10^(7))=7.5 m`
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Knowledge Check

  • A plane E.M. wave of frequency 40 MHz travels along X -axis. At same point at same instant, the electric field E has maximum value of 750 N//C in Y - direction. The magnitude and direction of magnetic field is

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