Question

15.Radar detectors use radio waves to measure the speed of moving vehicles

Radar detectors have a wavelength of 1.8 meters. What is the frequency of
waves from a radar detector?
A 3.7 X 10^-34 Hz
B 6.0 X 10^-9 Hz
C 5.4 X 10^8 Hz
D 1.7 X 10^8 Hz

Answer 1

Option D:1.7 × 10^(8) Hz

Step-by-step explanation:

We are given wavelength; λ = 1.8 m

To find the frequency, we will us the formula; v = fλ

Thus; f = v/λ

Where v is speed of light = 3 × 10^(8) m/s

Thus;

f = (3 × 10^(8))/1.8

f = 1.7 × 10^(8) Hz

So correct answer is Option D