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11th Grade Photometer Quizzes, Questions & Answers

11th Grade

Your Grade is 11

Top Trending Photometer Quizzes

Blue Hot, Red Cold: Stellar Temperature from Color Quiz

Using color to take the temperature of a sun. By comparing how bright a star is through a blue filter versus a yellow filter, scientists can determine its surface temperature without needing a thermometer. This stellar...

Questions: 20 | Attempts: 11 | Last updated: Feb 27, 2026

Sample Question 1
In the context of photometry basics, how is a "color index" mathematically defined?

The sum of two magnitudes

The difference between magnitudes in two different filters

The product of temperature and mass

The square of the star's radius

The ratio of distance to brightness

Sample Question 2
Which of the following best provides color indices explained in terms of a star's heat?

A positive B-V means the star is blue and hot

A negative B-V index indicates a hotter, bluer star

The index is always zero for stars hotter than the Sun

A larger index number means a higher temperature

Color index is unrelated to temperature

Sample Question 3
Which filters are part of the standard Johnson-Morgan UBV system used in filters in astronomy?

U (Ultraviolet)

B (Blue)

V (Visual/Yellow-Green)

R (Red)

X (X-ray)

11th Grade Photometer Quizzes, Questions & Answers

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