Where a parallel beam converges after a spherical glass surface or globe
This type of question, asked 2 times: 29 Jun 2022, 22 Jan 2026 S1. All 2 questions below, oldest first.
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Question 1
29 Jun 2022
29A parallel beam of light is allowed to fall on a transparent spherical globe of diameter and refractive index 1.5. The distance from the centre of the globe at which the beam of light can converge is .Question 2
22 Jan 2026 S1
23A parallel beam of light travelling in air (refractive index 1.0) is incident on a convex spherical glass surface of radius of curvature 50 cm. Refractive index of glass is 1.5. The rays converge to a point at a distance x cm from the centre of the curvature of the spherical surface. The value of x is cm.