Question

State magnification and focal length relationship for mirror and lens.
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Answer 1

For mirror and lens ,

magnification (m)=height of image/ height of object

Answer 2

For spherical mirror

Using mirror formula

1/f=1/u+1/v

1/f=v+u/vu

vu=f(v+u)

v=f(v+u)/u ...equation 1

Substitute equation one magnification formula

m=-v/u

m=-f(v+u)/u/u

m=-f(v+u)/u*1/u

m=-f(v+u)