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Question

Consider a concave mirror and convex lens (refractive index = 1.5) of focal length 10 cm each. separated by a distance of 50 cm in air (refractive index = 1) as shown in the figure. An object is placed at a distance of 15 cm from the mirror.Its erect image formed by this combination has magnification $$ M_1 $$ When the set-up is kept in a medium of refractive index 7/6 the magnification becomes $$ M_2 $$, The magnitude $$\frac {M_2}{M_1} $$ is ___________

A
7
B
2
C
5
D
8
Solution
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Correct option is C. 7

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