CUET Preparation Today
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 $\vec{E}$ 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 |
7.5 m |
$\lambda = \frac{c}{\nu} = \frac{3\times 10^8}{4\times 10^7} = 7.5 m$ |
