A particular star appears fainter seen through a blue filter than seen through a yellow filter.Which surface temperature is possible for this star? (See Figure 10-4,Comins,Discovering the Essential Universe,6th ed.)
A) 12,500 K
B) 38,000 K
C) 8800 K
D) 3800 K

Question

Quizplus · Accepted Answer

A star appearing fainter through a blue filter than a yellow filter suggests it emits less blue light, indicating a cooler surface temperature. 3800 K is consistent with a cooler star, which emits more light in the red/yellow spectrum than in the blue.

A Particular Star Appears Fainter Seen Through a Blue Filter