A red filter passes light at the long wavelength end of the visible spectrum as shown in Figure 17-7. Star 1 and Star 2 are viewed through identical red filters, and Star 1 appears brighter through the filter than does Star 2. What can be determined from this information?
A) Star 1 is hotter than Star 2.
B) Star 2 is hotter than Star 1.
C) Star 1 is more luminous than Star 2.
D) Nothing can be concluded from this fact alone.
Correct Answer:
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