A particular star appears approximately equally bright when viewed through a blue filter and through a yellow filter. What is the approximate surface temperature of this star?
A) 6000 K
B) 12,000 K
C) 3000 K
D) It is not possible for a star to be equally bright at two different wavelengths.

Question

Quizplus · Accepted Answer

Stars that appear equally bright in blue and yellow filters have a surface temperature that closely matches that of the Sun, which is approximately 6000 K. This is because the Sun emits a broad spectrum of light with a peak intensity in the green part of the spectrum, making it appear equally bright in adjacent parts of the spectrum such as blue and yellow.

A Particular Star Appears Approximately Equally Bright When Viewed Through