Calculate the focal length of a biconvex lens if the radii of its surf – McqOptions

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1.	Calculate the focal length of a biconvex lens if the radii of its surfaces are 50 cm and 20 cm, and index of refraction of the lens glass = 1.2.
A.	0.014 cm
B.	0.715 cm
C.	0.14 cm
D.	71.5 cm
Answer» E.

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