The Photosphere Is Very Thin Because

Multiple Choice

The photosphere is very thin because

A) the temperature of the photosphere increases rapidly from its base to its outer edge.
B) the gas bubbles that form the granulation pattern cannot travel very far.
C) the magnetic field compresses the photosphere.
D) the H ^- ion is a very good absorber of photons and causes the gas of the photosphere to be opaque.
E) the sun rotates differentially.