A spaceship is traveling toward Earth while giving off a constant radio signal with a wavelength of 1 meter. What will the signal look like to people on Earth?
A) a signal with a wavelength less than 1 m
B) a signal with a wavelength more than 1 m
C) a signal moving faster than the speed of light
D) a signal moving slower than the speed of light
E) a signal with a wavelength of 1 m, moving the normal speed of light

Question

Quizplus · Accepted Answer

Due to the Doppler effect, as the spaceship moves toward Earth, the wavelength of the radio signal will be compressed, resulting in a wavelength shorter than 1 meter.

A Spaceship Is Traveling Toward Earth While Giving Off a Constant