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

A plano-convex lens is made of refractive index of 1.6. The focal length of the lens is

A

400 cm

B

200 cm

C

100 cm

D

50 cm

Text Solution

Verified by Experts

The correct Answer is:
C
(c ) Here, `1/f=(mu-1)[1/R_(1)-1/R_(2)]`
`1/f=(1.6-1)[1/60-1/oo]=1/100`
`rArr` f=100 cm
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