What is the difference between brightness and luminosity?
A) These are different names for the same property.
B) Luminosity is how much light we see from a star; brightness is how much light it emits.
C) Brightness is how much light we see from a star; luminosity is how much light it emits.
D) Luminosity measures size; brightness measures temperature.
E) Brightness measure size; luminosity measures temperature.

Question

Quizplus · Accepted Answer

Brightness refers to how much light reaches us, while luminosity refers to the total amount of light emitted by a star. Therefore, they are not interchangeable terms, and option C is the correct choice. Options A and D are incorrect because brightness and luminosity are not the same thing. Option E is incorrect because neither brightness nor luminosity measures size; they are both measures of the amount of light emitted or received. Option B is partially correct in that luminosity does refer to the amount of light we see from a star, but brightness does not refer to the amount of light a star emits.

What Is the Difference Between Brightness and Luminosity