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Saturday, 10 October

JEE Main 2025 · PhysicsMultiple choiceDiagram basedMediumCalculation

JEE Main 2 April 2025, Shift 1, Physics Q42

Question 42 of 75 in this shift, Physics question 17 of 25, Section A.

A spherical surface separates two media of refractive indices 1 and 1.5 as shown in figure. Distance of the image of an object 'O', is : (C is the center of curvature of the spherical surface and R is the radius of curvature)

The figure, in words

Spherical refracting surface (curved line); object O on the axis at the left, 0.2 m from the surface, in Medium 1 (n1 = 1); centre of curvature C on the axis at the right, radius R = 0.4 m, in Medium 2 (n2 = 1.5).
  1. (1)0.4 m left to the spherical surfaceOfficial answer
  2. (2)0.4 m right to the spherical surface
  3. (3)0.24 m left to the spherical surface
  4. (4)0.24 m right to the spherical surface

Official answer

Option 1

NTA final key.

Chapter
Ray Optics and Optical Instruments
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.