WAEC - Physics (1997 - No. 19)
What is the frequency of a radio wave of wavelength 150m if the velocity of radio waves in free space is 3 x \(10^8ms^{-1}\)?
4.5 x \(10^{10}\)Hz
5x \(10^{9}Hz\)
4.5 x \(10^{8}Hz\)
2 x \(10^{7}Hz\)
2 x \(10^{6}Hz\)
توضيح
V=f\(\lambda, f =\frac{v}{\lambda}= \frac{3\times10^8}{150}\Rightarrow 2\times10^6\)Hz