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A plano-convex lens is made of refractiv...

A plano-convex lens is made of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is

A

50 cm

B

100 cm

C

200 cm

D

400 cm

Text Solution

Verified by Experts

The correct Answer is:
B
`(1)/(f) = (n- 1) ((1)/(R_(1)) - (1)/(R_(2)))`
`rArr f = (R )/(n - 1) = (60)/(1.6-1 ) = 100 cm " " [R_(1) = R, R_(2) = infty]`
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