APFIVE Refraction and Speed Ratio
A light ray traveling in medium 1 with speed v₁ enters medium 2 at an angle θ₁ = 45° to the normal. If the ray bends to θ₂ = 30° in medium 2, what is the ratio of speeds v₁/v₂?
A
tan(45°)/tan(30°) ≈ 1.73
B
45°/30° = 1.5
C
sin(30°)/sin(45°) ≈ 0.71
D
sin(45°)/sin(30°) ≈ 1.41
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