Question

Focal length= f=-10 cm object distance=u=30 cm height of the image= h2=-5 cm image distance=v=? height of object=h1=?

Answer 1

by magnification formula u can get the answer
m=v÷v=h2÷h1
and also apply the formula of 1÷f=1÷v+1÷u
u will get the answer

Answer 2

Answer:

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