When a convex lens is placed above an empty tank, the image of a mark at the bottom of the tank, which is 45 cm from the lens is formed 36 cm above the lens. When a liquid is poured in the tank to a d

Question

When a convex lens is placed above an empty tank, the image of a mark at the bottom of the tank, which is 45 cm from the lens is formed 36 cm above the lens. When a liquid is poured in the tank to a depth of 40 cm, the distance of the image of the mark above the lens is 48 cm. The refractive index of the liquid is

TestHub · Accepted Answer

Initially without water, 36 1 ​ − − 45 1 ​ = f 1 ​ ⇒ f = 20 then, after pouring water upto 40 cm apparent object distance = μ 40 ​ + 5 , 48 1 ​ + μ 40 ​ + 5 1 ​ = 20 1 ​ ⇒ μ = 1.366

Physics - Geometrical Optics Question with Solution | TestHub

Options:

Doubts & Discussion