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Benzoate
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Homework Statement
A variable star changes in brightness by a factor of 4. What is the change in magnitude?
Homework Equations
m and n represent two stars of magnitude
m-n=2.5 log(f(n)/f(m))
log (f(n)/f(m))=.4*(m-n)
The Attempt at a Solution
I think m-n is suppose to represent a change in magnitude.perhaps a factor of 4 = log(f(n)/f(m) . Therefore , m-n=2.5*4=10 ?