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July 29, 2015

Homework Help: Astronomy

Posted by nichola on Thursday, July 9, 2009 at 3:44pm.

I have two stars A = 7150K and B = 4850K.A is 20 times brighter than B.
Assuming L/Lv is the same for both stars find the ratio ofthe radii of A and B.
I have the equation R/R= (L/L)^1/2(T/T)^2.
I can do this for each star in terms of solar masses but i am unsure which temperature goes in the numerator/denominator?
Is (L/Lv)^1/2 sqr root 20?

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