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CBSE Class 10 Answered

The size of the image formed by a convex mirror of focal length 30 cm is a quarter of the size of a real object. Then the distance of the object from the mirror is
Asked by | 18 Oct, 2012, 06:41: PM
answered-by-expert Expert Answer
m=i/o=1/4=-v/u
v=-u/4
now putting in mirror formula:
1/v+1/u=1/f
-4/u+1/u=1/30    as for convex mirror:f=30 cm
u=-90 cm
Answered by | 18 Oct, 2012, 10:42: PM

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