Homework #4
•Q9. 6. Same M, one star is
type G, one is type B. G is bigger
•Q10. Star cools by factor of 2, expands by factor
of 10, what is its new luminosity compared to old? L goes as R2T4 so the temperature change
reduces L by 16 times, and the expansion increases it by 100
times, and 100/16 = 6.25.
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