A star with a surface temperature of 4000 K and a luminosity of about 10-² times that of the Sun is a member of which luminosity class? (See Figure 10-10,Comins,Discovering the Essential Universe,6th ed.)
A) III, giant
B) I, supergiant
C) II, bright giant
D) V, main-sequence

Question

Quizplus · Accepted Answer

A star with a surface temperature of 4000 K and low luminosity is typically a main-sequence star, which falls under luminosity class V.

A Star with a Surface Temperature of 4000 K and a Luminosity