Refractive index of medium where speed of light is v is:
An = v/c
Bn = c × v
Cn = c/v
Dn = v²/c
Answer & Solution
Correct answer: C. n = c/v
n = c/v. Higher n means slower light propagation. Vacuum: n = 1. Water: n ≈ 1.33, so v_water ≈ 2.26 × 10⁸ m/s. Glass: n ≈ 1.5, v ≈ 2 × 10⁸ m/s.
Related questions
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