The radii of curvature of the two surfaces of a lens are 20 cm and 30 – InterviewSolution

1.	The radii of curvature of the two surfaces of a lens are 20 cm and 30 cm and the refractive index of the material of the lens is 1.5. If the lens is concavo convex then , the focal length of the lens is ( in cm)
Answer» The radii of curvature of the two surfaces of a lens are $20 cm$ and $30 cm$ and the refractive index of the material of the lens is $1.5$ . If the lens is concavo convex then , the focal length of the lens is $($ in $cm)$

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