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 →E has its maximum value of 750 N/C in Y -direction. The wavelength of the wave is-
A
3.5m
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B
5.5m
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C
7.5m
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D
9.5m
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Solution
The correct option is C7.5m f=Cλ;λ=Cf=3×10840×106=7.5m