Question:
An equi biconvex lens 1 5 of focal length 20 cm is cut into
Last updated: 6/12/2023
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An equi biconvex lens 1 5 of focal length 20 cm is cut into two parts and placed in contact as shown in the figure A liquid of refractive index 1 3 is filled between the two parts of lens Then find the equivalent focal length of the combination in cm