Physics-
General
Easy
Question
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 
has its maximum value of 750 N/C in Y-direction The wavelength of the wave is
- 3.5 m
- 5.5 m
- 7.5 m
- 9.5 m
The correct answer is: 7.5 m
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