What is the frequency of a radio wave of wavele... - WAEC Physics 1997 Question
What is the frequency of a radio wave of wavelength 150m if the velocity of radio waves in free space is 3 x \(10^8ms^{-1}\)?
A
4.5 x \(10^{10}\)Hz
B
5x \(10^{9}Hz\)
C
4.5 x \(10^{8}Hz\)
D
2 x \(10^{7}Hz\)
correct option: e
V=f\(\lambda, f =\frac{v}{\lambda}= \frac{3\times10^8}{150}\Rightarrow 2\times10^6\)Hz
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