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Luminosity: Quiz


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Question 1: For stars on the ________, luminosity is also related to mass:
Main sequenceSupernovaWhite dwarfStellar classification

Question 2: Visible brightness is usually measured by ________.
Absolute magnitudeSupernovaApparent magnitudeStar

Question 3: The ________ unit for luminance is candela per square metre.
Systems of measurementMetric systemInternational System of UnitsConversion of units

Question 4: A hollow ________ centered on the point would have its entire interior surface illuminated.

Question 5: In measuring star brightnesses, visible luminosity (not total luminosity at all wave lengths), ________ (visible brightness), and distance are interrelated parameters.
Apparent magnitudeBinary starSupernovaAbsolute magnitude

Question 6:
Luminosity, Rani Lakshmibai and Revelstoke, British Columbia are all:
Physical quantities Photometry Scattering theory All pages needing cleanup

Question 7: The apparent magnitude is the observed visible brightness from ________, and the absolute magnitude is the apparent magnitude at a distance of 10 parsecs.

Question 8: Given a visible luminosity (not total luminosity), one can calculate the ________ of a star from a given distance:
Binary starSupernovaApparent magnitudeAbsolute magnitude

Question 9: It has been shown that the luminosity of a star L (assuming the star is a ________, which is a good approximation) is also related to temperature T and radius R of the star by the equation:
Black bodyPlanck's lawPhotonSun

Question 10: In ________'s imaging operations, luminosity is the term used incorrectly to refer to the luma component of a color image signal; that is, a weighted sum of the nonlinear red, green, and blue signals.
Adobe PhotoshopAdobe Photoshop ElementsAdobe FlashAdobe Illustrator


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