As a White Dwarf Star Gradually Cools, Its Radius Stays

question 39

Multiple Choice

As a white dwarf star gradually cools, its radius stays approximately constant. What is happening to the white dwarf's luminosity?

• A) It stays the same.
• B) It increases.
• C) It increases then decreases periodically.
• D) It decreases.
• E) You can't tell from the information given.

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