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  4. The velocity of all radio waves in free space is 3 × 108 m / s. The frequency of a radio wave of wavelength 150 m is:

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Q. 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:

Communication Systems

Solution:

Frequency of radio wave
$v=\frac{c}{\lambda}=\frac{3 \times 10^{8}}{150}$
$2 \times 10^{6}=2 MHz$