A type II supernova
A)occurs when a white dwarf's mass exceeds the Chandrasekhar limit.
B)is the result of helium flash.
C)is characterized by a spectrum that shows hydrogen lines.
D)occurs when the iron core of a massive star collapses.
E)is characterized by a spectrum that shows hydrogen lines and occurs when the iron core of a massive star collapses.

Question

Quizplus · Accepted Answer

A type II supernova is characterized by its spectrum showing hydrogen lines, indicating that the progenitor star had not lost its hydrogen envelope, and it occurs when the iron core of a massive star collapses under gravity, leading to a catastrophic explosion.

A Type II Supernova