A concave mirror produces a real image with |m|=3. Which quantities can be obtained immediately from |f| without solving a quadratic?
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Question

A concave mirror produces a real image with |m|=3. Which quantities can be obtained immediately from |f| without solving a quadratic?

G1 Physics · Accepted Answer

For M=3, u=f(1+1/3)=4f/3 and v=Mu=4f. Separation=8f/3, while longitudinal magnification is M²=9.