Question

Question 10 of 10

How do we know the sun rotates?
A. Both sides are blue-shifted.
B. One side is blue-shifted and the other side is red-shifted.
C. Both sides are red-shifted.
D. Because Earth rotates.

Answer 1

We know the sun rotates through the phenomena of the Doppler effect, sunspots, and the motion of solar flares and prominences.

Step-by-step explanation:

The rotation of the sun is observed through various phenomena. One way we know the sun rotates is through the Doppler effect, which is a shift in the wavelength of light. The different sides of the sun emit light that is either blue-shifted or red-shifted. This indicates that the sun is rotating.

Another method is the observation of sunspots. Sunspots are dark patches on the surface of the sun caused by magnetic activity. By tracking the movement of sunspots, we can determine that the sun rotates on its axis.

Additionally, the motion of solar flares and prominences can also be used to infer the rotation of the sun. These eruptions occur in different regions of the sun and their trajectories suggest the rotation of the sun.

Learn more about Rotation of the sun