Question

Calculate the wavelength of a radio-wave with a frequency of 200kHz when the speed of ligh

in air = 3 x 105 km/s

Answer 1

The wavelength of radio wave with a frequency of 200khz is 1.5km

we know that,

velocity = frequency x wavelength

Therefore,

3x10^5 km/s = 200khz x wavelength

wavelength = 3x10^8 m/s / 2x10^5 hz

wavelength = 1.5x10^3 m or,

wavelength = 1.5 km