Answer: When there is high magnetic activity, there are more sunspot, this sunpost emit more ultraviolet and visible radiation from the sun.
Explanation:
Sunpost are the most dark and cool area on the sun photosphere. The are like storm on the the sun surface and are characterized by high magnetic field. The originate from the sun and influence galactic rate. They emanate as pair of magnetic disturbances around the sun surface thereby emitting for charged particles from the sun surface which lead to increase in emittion of ultraviolet radiation and visible radiation from the sun.
