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Question: An equiconvex lens is prepared from a glass of refractive index 1.5. The radius of curvature of the surface is 0.5 m. The focal length of the lens is-
1)0.5 m
2)1.0 m
3)1.5 m
4)2.0 m


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Exam Exam: Light QUESTIONS





1/f=(1.5-1)(1/0.5+1/0.5)
= (0.5)(2+2)
= 2
f= 1/2=0.5m

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