The Energy Source That Heats the Low-Density Coronal Gas to Extremely

question 239

Multiple Choice

The energy source that heats the low-density coronal gas to extremely high temperatures is MOST probably:

• A) conduction because the chromosphere and corona contain high densities of free electrons that facilitate conduction.
• B) rearrangements within complex magnetic field structures that energize the ionized gas.
• C) convective currents in the chromosphere that carry hot gas outward from the photosphere.
• D) radiative heat from the photosphere that is strongly absorbed by highly ionized atoms such as Fe XIV.

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