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23. Radii of curvature of a concavo-convex lens (refractive index = 1.5) are
40 cm (concave side) and 20 cm (convex side) as shown. The convex
side is silvered. The distance x on the principal axis where an object is
placed so that its image is created on the object itself, is equal to :
(A) 12 cm
(B) 15 cm
(C) 16 cm
(D) 24 cm
R = 40 cm
R = 20 cm
...chita dan,
after fitting a class with black stroaks
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