Modern astronomers suspect the corona is heated by
A) shock waves rising from below the photosphere.
B) the solar wind.
C) the solar magnetic field.
D) all of these
E) none of these

Question

Quizplus · Accepted Answer

Modern astronomers believe that the corona is heated by the solar magnetic field, which causes the material in the corona to be highly ionized and heated to temperatures of millions of kelvin. However, shock waves and the solar wind can also contribute to the heating of the corona to some extent.

Modern Astronomers Suspect the Corona Is Heated by