The Star Regulus,in the Constellation Leo,appears Brighter Through a Blue

question 108

Multiple Choice

The star Regulus,in the constellation Leo,appears brighter through a blue filter than it does through a yellow filter.Suppose that a second star is found that has the same brightness as Regulus through the blue filter but is brighter than Regulus through the yellow filter.From this information,we can say conclusively that the second star has:

• A) a higher temperature.
• B) the same temperature but a higher luminosity.
• C) the same temperature but a lower luminosity.
• D) a lower temperature.

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