Acertain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm.
a)find the frequency of this radiation. b)find the time required for a pulse of radar waves to reach an airplane 4.8 km away and return.

a) frequency =

b) times =

Explanation:

Part a)

As we know that frequency of radiation is given as

now we know that

now frequency is given as

Part b)

Time required for the pulse to reach the airplane and return is given by formula

total distance for moving to and fro = 4.8 km + 4.8 km = 9.6 km

speed of the wave =

now times is given as

mistakes are ok