Star A has a temperature 1/4 that of star B. Both star A and star B are the same physical size.Which statement below is correct?
A)Star A is redder and dimmer than star B.
B)Star A is bluer and dimmer than star B.
C)Star A is redder and brighter than star B.
D)Star A is bluer and brighter than star B.
E)Star A and star B have the same color, but star A is brighter.

Question

Quizplus · Accepted Answer

Star A has a lower temperature than star B, so it emits more red light and less blue light. Therefore, star A appears redder than star B. Additionally, since both stars are the same physical size, and star A is dimmer than star B, it must be emitting less light overall, making it dimmer. Since star A has a lower temperature, it emits most of its radiation in the red part of the spectrum, making it appear redder than star B. Additionally, since both stars are the same physical size but star A is cooler, it will have a lower luminosity and will appear dimmer than star B.

Star a Has a Temperature 1/4 That of Star B