(a) Derive the lens makers formula.(b) The radii of curvature of the faces of a double convex lens are 10cm and 15m. It’s focal length is 12cm. What is the refractive index of glass?
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The following assumptions are taken for the derivation of lens maker formula.
Let us consider the thin lens shown in the image above with 2 refracting surfaces having the radii of curvatures R1 and R2 respectively.
Let the refractive indices of the surrounding medium and the lens material be n1 and n2 respectively.
Let us consider the thin lens shown in the image above with 2 refracting surfaces having the radii of curvatures R1 and R2 respectively.
Let the refractive indices of the surrounding medium and the lens material be n1 and n2 respectively.
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