Measurements of the brightness of a distant star through the three appropriate filters indicate that the star is brightest in U, less bright in B, and faintest in V. What conclusion can be drawn from this information, assuming no absorption of light between the star and Earth?

Question

Quizplus · Accepted Answer

The U, B, and V filters correspond to ultraviolet, blue, and visible (green-yellow) parts of the spectrum, respectively. A star that is brightest in U and less bright in B and V is emitting most strongly in the ultraviolet, indicating a very high surface temperature.

Measurements of the Brightness of a Distant Star Through the Three