Question

what is the frequency of radio waves with wavelength of 40 m

Answer 1

The frequency of radio waves with wavelength of 40 m is  $7.5 \times 10^6$ Hz.

Explanation:

We know that,

                           $v = f \times \lambda$

Where,

$v$ is the velocity of light,

$f$ is the frequency,

$\lambda$ is the wavelength.

Therefore, we need to find the frequency,

So,

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

i.e, Frequency = velocity of light / wavelength

Then,

$v$ = $3 \times 10^8 ms^{-1}$

$\lambda$ = 40 m

 Frequency (f) = $\frac{3 \times 10^8}{40}$

                     (f) = $7.5 \times 10^6$ Hz.

To know more:

The wave length of a radio wave is 1.0.find its frequency?

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