The velocity of electromagnetic waves in free space is `3xx10^(8)` m/s. Whal is the frequency (in MHz) of the wavelength of vaJue 150 m?

Options

A. 50 KHz
B. 2 kHz
C. 2 MHz
D. 1 MHz

Answer

C

Explanation

Here: Velocity of electromagnetic waves in free space and wavelength
`v = 3 xx 10^8 "m/s"`
`lambda = 150 m`
Using the relation for the frequency of radio waves is given by
`f = (v)/( lambda) = (3 xx 10^3)/( 150)`
`lambda = 2 xx 10^6 "Hz" = 2 "MHz"`