The ratio of the brightness of a star at two different colors, blue and visual-b_V/b_B-is a direct measure of what property of the star?

Question

Quizplus · Accepted Answer

The ratio of the brightness of a star at different colors is related to its surface temperature. This is because stars with different temperatures emit different amounts of radiation at different wavelengths, which affects their brightness in different colors. Therefore, by comparing the brightness of a star at different colors, we can infer its surface temperature.

The Ratio of the Brightness of a Star at Two