Question

a radio signal transmits waves of wave length 100m.if speed of radio wave is given as 3×10^8m/s. calculate the frequency of radio wave.

Answer 1

frequency= s. light/ Wavelength
3x10^8/100=3x10^6

Answer 2

Answer:

The frequency of the wave = $3\times 10^6\ Hz.$

Explanation:

The frequency of a wave is defined as the number of oscillations it completes in unit time. It is measured in units of per second and its SI unit is Hertz.

It is related with the wavelength and the speed as follows:

$\rm c = \nu \times \lambda.$

where,

• $\rm c$ = speed of the wave.
• $\lambda$ = wavelength of the wave.
• $\nu$ = frequency of the wave.

Given that a radio signal transmits waves of wavelength 100 m, and the speed of the wave is $\rm 3\times 10^8\ m/s.$,

which means,

$\rm \lambda = 100\ m.\\c = 3\times 10^8\ m/s.$

The frequency of the wave is given as:

$\rm \nu=\dfrac{c}{\lambda}=\dfrac{3\times 10^8}{100}=3\times 10^6\ Hz.$