JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 13 April 2023, Shift 1, Physics Q44

Question 44 of 90 in this shift, Physics question 14 of 30, Section A.

A vessel of depth 'd' is half filled with oil of refractive index

n_1

and the other half is filled with water of refractive index

n_2

. The apparent depth of this vessel when viewed from above will be-

(1) $\frac{d\,n_1 n_2}{2(n_1+n_2)}$
(2) $\frac{d\,n_1 n_2}{(n_1+n_2)}$
(3) $\frac{2d(n_1+n_2)}{n_1 n_2}$
(4) $\frac{d(n_1+n_2)}{2n_1 n_2}$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Ray Optics and Optical Instruments
Topic: Refraction and Snell's Law
Idea tested: Apparent Depth of Immiscible Liquids

Same idea in other shifts

Asked 4× in all

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.