Lens focal length change (Jee Mains) | ExamDuo
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Lenses and Prisms
Medium
Lens focal length change
A convex lens of focal length 20 cm made of glass of refractive index 1.5 is immersed in water having refractive index 1.33.
The change in the focal length of lens is
SELECT ONE OPTION
A
62.2 cm
B
5.82 cm
C
58.2 cm
D
6.22 cm
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