Question

.The image formed by a convex mirror of focal length 30 cm is a quarter of the object, what is the

distance of object from the mirror?( -90 cm)​

Answer 1

F=30cm

M=1/4

-v/u=1/4

V=-u/4

1/v+1/u=1/f

-4/u+1/u=1/30

-4+1/u=1/30

-3/u=1/30

U=30*(-3)

U= -90cm

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