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