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A point source S is placed at a distance of 21 cm from a convex mirror of focal
length 12 cm. What is the distance (in cm) of a converging lens of focal length 10
cm from mirror, placed between the source and the mirror to get the final image on
the source itself
Q21.
Options:
12 cm
X10 cm
6 cm
5 cm
Solution...(Photo from பாரத் பாரதி)
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