As an observer moves closer to a star, which two of its properties change?
A) luminosity and absolute magnitude
B) luminosity and apparent brightness
C) absolute magnitude and brightness
D) apparent magnitude and brightness

Question

Quizplus · Accepted Answer

As an observer moves closer to a star, its apparent magnitude (how bright the star appears from Earth) and its brightness (the amount of starlight reaching the observer) increase. Luminosity (the total amount of energy emitted by the star) and absolute magnitude (the brightness of a star as seen from a standard distance) are intrinsic properties of the star and do not change with the observer's distance.

As an Observer Moves Closer to a Star, Which Two