Multiple choice

The colour of a star is an indication of its

  1. Distance from the sun

  2. Luminosity

  3. Distance from the earth

  4. Temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A star's color directly indicates its surface temperature following Wien's displacement law. Hotter stars appear blue or white (over 10,000K), medium-temperature stars like our Sun appear yellow (5,500-6,000K), while cooler stars appear orange or red (below 3,500K). Color does not indicate distance or luminosity directly, though luminosity combines temperature and size.

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