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:D
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