A certain radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 3 cm. (a) Show that the frequency of this radiation, measured in billions of...

A certain radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 3 cm. (a) Show that the frequency of this radiation, measured in billions of hertz, is 10 GHz. (b) Show that the time required for a pulse of radar waves to reach an airplane 5 km away and return is
 s.