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Pradeep Asked a Question
December 5, 2020 12:17 ampts 30 pts
50. When sunlight is focused on a paper using a bi-convex lens, it starts to burn in the shortest time if the lens is kept 0.5 m above it. If the radius of curvature of the lens is 0.75 m then, the refractive index of the material is
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  • Ruby negi thankyou
    1.75 correct answer..
    • cropped-363708139.jpg
    Likes(1) Reply(7)
    Pradeep
    but this formula is for thin lens
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