Physics · Oct / Nov 2025 · Paper 12 · Question 27
Light passes into a transparent material that has a refractive index n. The angle of incidence at the surface of the transparent material is i. Which equation is used to calculate the angle of refraction r?
- Ar = n sin i
- Bi = n sin r
- Csin r = n / sin i
- Dsin r = sin i / n
As printed in the paper
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Correct answer: D. sin r = sin i / n
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