Question

Compute the frequency (in MHz) of an EM wave with a wavelength of 9.0 in. (0.2286 m).

Answer 1

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

$\lambda$ - wavelength, m

$c$ - speed of light, $c=3 \cdot 10^8 \; m/s$

$f$ - frequency, Hz

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

$f = \frac{3 \cdot 10^8}{0.2286} \approx 1312.3 \cdot 10^6 \; Hz =1312.3 \; MHz$

Answer: 1312.3 MHz.