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# Calculate the speed of the wave that has a frequency of 3 GHz and a wavelength of 4mm

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For a plane wave in a homogeneous medium, the phase velocity of the wave is related to the frequency and the wavelength by the relation
velocity = wave_length*frequency
In this case
velocity (in m/s)=(4*10^-3 m )*(3*10^9 s^-1)=12*10^(9-3)=12*10^6
Thus velocity=1.2*10^7 m/s

Posted on Nov 28, 2013

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