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InterviewSolution
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Find the focal length of plano convex lens, when its radius of curvature of the surface is R and n is the refractive index of the lens? |
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Answer» Solution :Len's MAKER formula `IMPLIES (1)/(F)= (n-1)((1)/(R_1) - (1)/(R_2))` `R_1 = OO` ( for plano convex lens ) `R_2 = - R` ( for convex lens ) `implies (1)/(f) = (n-1) (0+(1)/(R ))` `implies (1)/(f) = ((n-1))/(R ) implies f = (R )/((n-1))`. |
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