A radar pulse sent out to an airplane at a distance of 20.0 km will return as an echo to the source in what time interval? (c = 3.00 x 10⁸ m/s)

Question

Quizplus · Accepted Answer

The time taken for the radar pulse to travel to the airplane and back is given by:
time = 2 x distance / speed of light
= 2 x 20.0 km / 3.00 x 10^8 m/s
= 1.33 x 10^-4 s
= 133 x 10^-6 s
Therefore, the answer is C, 133 x 10^-6 s.

A Radar Pulse Sent Out to an Airplane at a Distance