MHT CET 2022 Physics question
A double convex lens made of glass has both radii of curvature of magnitude 20 cm. Incident light rays parallel to the axis of the lens will converge to a point at a distance 'L' from the common pole P. The value of L is [Refractive index of glass = 1.5]
Answer: (D)
Solution
Lens maker's formula: . For a double convex lens cm and cm, so $ = (1.5 - 1)( + ) = 0.5× =
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