O-LevelPhysicsLight5054/12 · Oct/Nov 2025 · Q271 Mark
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
✓ Correct answer
D: sin r = sin i / n
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