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A plano convex lens when silvered at its plane surface is equivalent to a concavd mirror of focal length 28 cm when its curved surface is silvered and the plane surface is not silvered it is equivalent to a concave mirror of focal length 10 cm then the refractive index of the material of the lens is A) 9/14 B) 14/9 C) 17/9 D) none

A plano convex lens when silvered at its plane surface is equivalent to a concavd mirror of focal length 28 cm when its curved surface is silvered and the plane surface is not silvered it is equivalent to a concave mirror of focal length 10 cm then the refractive index  of the material of the lens is
A) 9/14
B) 14/9
C) 17/9
D) none

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1 Answers

Arun
25757 Points
4 years ago
Dear student
 
I am getting my qnswer as mu = 1.55 = 14/9.
 
hope it helps
Regards
Arun (askIITians Forum expert)

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