Question

A radio station is broadcasting programmes at $100$ MHz frequency. If the distance between the radiostation and the receiver et is $300$km, how long would it take the signal to reach the set from the radio station? Also calculate wavelength and wave number of these radio waves.

Answer 1

Let us consider the problem,

Let us consider,

Frequency $\times$ wavelength $=C$

Implies that

Wavelength $=\frac{c}{f}$

(since, $imhz=1000000hz$ )

Implies that

$3\times 10$ rise to $\frac{8}{10}$ rise to $8$

$=3m$ is the wavelength

Wave number $\frac{1}{3}=0.33$.