Physics · Geometrical Optics

JEE Main 2024 — 31 January, Shift 2 — Question 49

Light from a point source in air falls on a convex curved surface of radius 20 cm and refractive index 1.5. If the source is located at 100 cm from the convex surface, the image will be formed at cm from the object.

Answer: 200

Numerical answer — enter this value.

Step-by-step solution

$\frac{\mu_{2}}{\mathrm{v}}-\frac{\mu_{1}}{\mathrm{u}}=\frac{\mu_{2}-\mu_{1}}{\mathrm{R}}$

$\frac{1.5}{\mathrm{v}}-\frac{1}{-100}=\frac{1.5-1}{20}$

$\mathrm{v}=100 \mathrm{~cm}$

Distance from object $=100+100$

$=200 \mathrm{~cm}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 31 January, Shift 2
Subject: Physics
Chapter: Geometrical Optics
Topic: Refraction at Curved Surface and Glass Sphere