1.

An object is placed in front of a convex mirror of radius of curvature 40cm at a distance of 10cm. Find the position nature and magnification of mirror.

Answer»

SOLUTION :u=-10cm R=-40cm
Then f=R/2=-20cm
From the mirror formula 1/v=1/f-1/u
-1/20+1/10=1/20
V=20cm so v is POSITIVE
Hence a virtual and erect IMAGE will be FORMED on the other side of the object, i.e BEHIND the mirror.
M=-v/u=-20/-10=2
Magnification of mirror is 2


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