Question

Calculate the wavelength of an electromagnetic wave of frequency 15 MHz
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Answer 1

The wavelength of the electromagnetic wave is 19.98 m

Explanation:

Let the wavelength be represented by W, Frequency be represented by F, Speed be S

Formula:

W=S/F

Given: F = 15 MHZ

Hence, F = 15.10^6 HZ

Therefore,  

Speed of the electromagnetic wave, S = 299792458 m/s

So,

W=S/F  

= 299792458/ 15.10^6

= 19.98616387 m

Hence, the wavelength of the electromagnetic wave is 19.98616387 m

Answer 2

The wavelength of the wave is 20 meters.

Explanation:

Given that,

Frequency of the electromagnetic wave, $f=15\ MHz=15\times 10^6\ Hz$

We need to find the wavelength of an electromagnetic wave. We know that the relation between wavelength and frequency of a wave is given by :

$c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{15\times 10^6}\\\\\lambda=20\ m$

So, the wavelength of the wave is 20 meters. Hence, this is the required solution.

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