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As shown in figure, a liquid of refractive index ‘2’ is poured onto the concave surface of concave – convex lens. R1 and R2 are the radii of curvature of convex and concave surfaces of the lens respectively and R1 = 2R2. The refractive index of material of lens is 1. For which combination of 1 and 2, the whole system behalves as a diverging lens.

(a)

1 = 1.2 and 2 = 1.8

(b)

1 = 1.63 and 2 = 1.35

(c)

1 = 1.56 and 2 = 1.33

(d)

1 = 1.7 and 2 = 1.33


Question ID - 102224 :-

As shown in figure, a liquid of refractive index ‘2’ is poured onto the concave surface of concave – convex lens. R1 and R2 are the radii of curvature of convex and concave surfaces of the lens respectively and R1 = 2R2. The refractive index of material of lens is 1. For which combination of 1 and 2, the whole system behalves as a diverging lens.

(a)

1 = 1.2 and 2 = 1.8

(b)

1 = 1.63 and 2 = 1.35

(c)

1 = 1.56 and 2 = 1.33

(d)

1 = 1.7 and 2 = 1.33

1 Answer
5876 Votes
3537

Answer Key : (d) -

1 = 1.7 and 2 = 1.33



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