Question

Find the radius of curvature of the convex surface of a plane convex lens, whose focal length is 0.3m and the refractive index of the material of the lens is 1.5?

Answer 1

we know , lens maker formula,

1/f = (u -1){ 1/R1 - 1/R2 }

where u = refractive index of lens with respect to medium .
R1 and R2 radius of curvature of lens

here question ask ,
only find radius of curvature of convex lens
it means lens must be biconvex lens
hence,
R1 = R
R2 = -R

now ,

1/f = ( u -1) { 1/R + 1/R }

1/0.3 = 2(1.5-1)/R

1/0.3 = 1/R

R = 0.3

Answer 2

Answer:

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Explanation:

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