Astronomy quiz question: M5 giant vs. M5 red dwarf

Astronomy 210 Quiz 5, fall semester 2018
Cuesta College, San Luis Obispo, CA

An M5 giant and an M5 red dwarf could have the same:
(A) luminosity.
(B) size.
(C) temperature.
(D) (Two of the above choices.)
(E) (All of the above choices.)
(F) (None of the above choices.)

Correct answer (highlight to unhide): (C)

An H-R diagram is provided with this quiz.


These stars are plotted on an H-R diagram below. While the M5 giant is both larger and more luminous than the M5 red dwarf, they will have the same temperature, as they have the same spectral type.


Section 70160
Exam code: quiz05Oor7
(A) : 2 students
(B) : 0 students
(C) : 9 students
(D) : 2 students
(E) : 2 students
(F) : 2 students

Success level: 54% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 1