When observing a star that increases dramatically in brightness,if a plateau is observed in the light curve during the declining phase,the event is probably:
A) a nova.
B) a type I supernova.
C) a type II supernova.
D) fusion in an accretion disk around a white dwarf.
E) fusion in an accretion disk around a neutron star.

Question

Quizplus · Accepted Answer

A plateau in the light curve during the declining phase is characteristic of a type II supernova, which occurs when a massive star explodes and the light curve is sustained by the hydrogen envelope.

When Observing a Star That Increases Dramatically in Brightness,if a Plateau