Question

an object is placed at 10 centimetre form a concave mirror produces three times magnified real image calculate focal length of the mirror​

Answer 1

Explanation:

Answer

Correct option is

A

−0.02 mm

The screw gauge is at 98 at its mean position

i.e. (100−98)=2 division behind.

we know that, least count of screw gauge is

=0.01 mm

If is behind the mean position

:. negative error

and equal t0=

−2× Least count

=−0.02 mm

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