Question

The frequency of radio waves corresponding to a wavelength of 10 m is

• A. $3\times {10}^{7}Hz$
• B. $3.3\times {10}^{8}Hz$
• C. $3\times {10}^{9}Hz$
• D. $3\times {10}^{-7}Hz$

Answer 1

The correct option is A $3\times {10}^{7}Hz$

For radio waves, speed $v=c=3\times {10}^{8}m/s$

Given, $\lambda =10m$

$v=f\lambda$

$f=3\times {10}^{7}Hz$