Question

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

Answer: (A)

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

Wavelength, $\lambda =10m$
Using the relation $\nu =\frac{c}{\lambda }=\frac{3\times {10}^8}{10}=3\times {10}^{7}Hz$