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A plano convex lens has radius of curvature 60 cm and refractive index 1.5. When the convex surface is silvered, the system will work as concave mirror of focal length _?

A plano convex lens has radius of curvature 60 cm and refractive index 1.5. When the convex surface is silvered, the system will work as concave mirror of focal length _?

Grade:12

2 Answers

Nimish
14 Points
3 years ago
The answer will be 180cm with a negative sign as the question is for concave mirror the sign would be negative
Kavya Negi
26 Points
3 years ago
Nimish, can you please provide a little more detailed expanation? expalining why?
which formulae used
 

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