The angle between the surface of a glass slab and incident ray is 30º. The angle of incidence is ........................

Q.1 (A)(v) The angle between the surface of a glass slab and incident ray is 30º. The angle of incidence is ........................

A. 30º

B. 60º

C. 90º

D. None of these

Doubtly Asked 25 Oct 2026 ssc 10th Save WhatsApp Report

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Answer: B. 60º

Answer: (b) 60º

The angle of incidence is measured between the incident ray and the normal, not the surface. The normal makes 90º with the surface, so angle of incidence = 90º – 30º = 60º.

Doubtly AI · 25 Oct 2026 AI-verified · Oct 2026 Report

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The angle between the surface of a glass slab and incident ray is 30º. The angle of incidence is ........................

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