Weather Forecasting, A radar installation used for monitoring thunderstorms emits radio waves at a frequency of2800 MHz. A line of thunderstorms is approaching the installation at 42.0 km/h.
(a) In the frame of reference of the thunderstorms, is the frequency of the radio waves greater than or less than 2800 MHz? Why? By what amount does the frequency differ from 2800 MHz? (You may use the formulas derived in Problem 16.78. Radio waves travel at the speed of light, c = 3.00 X 108 m/s.)
(b) Radio waves are reflected from the water drops in the thunderstorms, and the reflected waves are detected back at the installation. As measured by the receiver at the
Installation, is the frequency of these reflected waves greater or less than 2800 MHz? Why? By what amount does the frequency of the reflected waves differ from 2800 MHz?