allerySnell's law of refraction states:
An₁/sin θ = n₂
Bn₁ sin θ₁ = n₂ sin θ₂
Csin θ₁ = sin θ₂
Dn₁ cos θ₁ = n₂ cos θ₂
Answer & Solution
Correct answer: B. n₁ sin θ₁ = n₂ sin θ₂
**Snell's law:** n₁ sin θ₁ = n₂ sin θ₂, where θ₁, θ₂ are angles measured from normal.
n = c/v (refractive index).
When light enters denser medium, it bends toward normal.
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