Star A has a temperature $1 / 2$ hat of star B, but star A is 5 times bigger than star B. Whichstatement 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

The color of a star is determined by its temperature, with cooler stars appearing redder and hotter stars appearing bluer. Since Star A is cooler (half the temperature) than Star B, it will appear redder. The brightness of a star depends on both its size and temperature. Despite being cooler, Star A's significantly larger size (5 times bigger) compensates for its lower temperature, making it brighter than Star B.

Star a Has a Temperature 1/21 / 21/2 Hat of Star B, but Star a Is 5 Times

Star a Has a Temperature $1 / 2$ Hat of Star B, but Star a Is 5 Times