Question:
The velocity of all radio waves in free space is $3 \times 10^{8} m / s$. The frequency of a radio wave of wavelength $150\, m$ is :
The velocity of all radio waves in free space is $3 \times 10^{8} m / s$. The frequency of a radio wave of wavelength $150\, m$ is :
Updated On: Jul 2, 2022
- 20 kHz
- 2 kHz
- 2 MHz
- 1 MHz
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The Correct Option is C
Solution and Explanation
Here : Velocity of electromagnetic waves in free space and wavelength
$v =3 \times 10^{8} m / s$
$\lambda =150\, m$
Using the relation for the frequency of radio waves is given by
$=\frac{v}{\lambda}=\frac{3 \times 10^{8}}{150}$
$=2 \times 10^{6} Hz =2\, MHz$
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Concepts Used:
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