The velocity of all radio waves in free space is 3 × 108 m/s. The frequency of a radio wave of wavelength 150m is
A. 20 kHz
B. 2 kHz
C. 2 MHz
D. 1 MHz
Answer:A
The velocity of all radio waves in free space is 3 × 108 m/s. The frequency of a radio wave of wavelength 150m is
A. 20 kHz B. 2 kHz C. 2 MHz D. 1 MHz