Physics · 2026
JEE Main · 22 January 2026, Shift 1 · Q42
Consider an equilateral prism (refractive index √ 2 ). A ray of light is incident on its one surface at a certain angle i. If the emergent ray is…
Consider an equilateral prism (refractive index $\displaystyle \sqrt{2}$ ). A ray of light is incident on its one surface at a certain angle $\displaystyle i$. If the emergent ray is found to graze along the other surface then the angle of refraction at the incident surface is close to $\displaystyle \_\_\_\_$.
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle 15^{\circ}$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.