Question

An object of 5cm is
placed at 50 cm away
from the principle focus
of a concave mirror of
50cm focal length. find
the magnification of the
mirror.
O-1
O 1
O-2
O 2​

Answer 1

ANSWER

Given,

Focal length, f=50cm

Magnification, m=2

m=uv=2

v=2u

From mirror formula,

f1=v1+u1

f1=2u1+u1

u=23f=23×50=75 cm

Object Is placed at 75cm from the mirror.

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