Question

For six months of each year, Earth travels toward the star Polaris. For six months each year, Earth travels away from Polaris.





Question
Which describes how wavelengths of light from Polaris would be observed from Earth when Earth is moving ,begin emphasis,away,end emphasis, from Polaris?

Answer options with 4 options
A.
They would be red shifted.

B.
They would be blue shifted.

C.
They would be green shifted.

D.
They would be yellow shifted.

Answer 1

When Earth is moving away from Polaris, the wavelengths of light observed from Earth would be red shifted. This is due to the Doppler effect, where the light waves are stretched, resulting in longer wavelengths and a shift towards the red end of the spectrum.

Therefore, the correct answer is:

A. They would be red shifted.