A double convex lens made of material of refractive index μ 1 is placed inside two liquids of refractive index µ 2 and µ 3 as shown in figure where μ 2 > μ 1 > μ 3 . A wide parallel beam of light is incident on lens from left. The lens will give rise to -
Text Solution
Verified by ExpertsThe correct answer is:
D
= 
(focal length of upper part of lens)
= 
(focal length of lower part of lens)
as μ 2 > μ 1 f 1 = +ve converging lens
as μ 3 < μ 1 f 2 = –ve diverging lens
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