Question

two two surfaces of a biconvex lens have real radii of curvature r and its refractive index and is 1.5 the focal length of lens will be

a r/2

b r

c d

d 2r
​

Answer 1

Answer:

yxitsiusturycxgizyiy9ssy8dyiistysitsitsztiyod

Answer 2

2r is the correct answer

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