Question

Problem 15

Answer 1

Given information

Depending on the relative speed of the source and observer, light from moving objects will appear to have different wavelengths.

Observers gazing at a moving object perceive light with a longer wavelength than when it was emitted (a redshift), whereas observers looking at an approaching source see light with a shorter wavelength (a blueshift) (a blueshift).

Step-by-step explanation

Step 1.

If the source and observer move in the same direction and at the same speed, there is no Doppler shift.