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An object is placed at distance of 25cm ...

An object is placed at distance of 25cm from a spherical mirror & its image is formed behind the mirror at distance of 5cm. Find focal length ? Is it concave or convex mirror?

Text Solution

Verified by Experts

Here u=-25cm , v=5cm from the mirror formula 1/f=1/u +1/v
Then 1/f=-1/25+1/5=4/25
F=6.25cm
as the focal length is positive the mirror is convex in nature.
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