An incident ray of light strikes water at an angle of 30 degrees The index of refraction of air is 1 point 0 0 0 3 , and the index of refraction of water is 1 point 3 3 What is the angle of refraction rounded to the nearest whole number?

Use Snell’s law: n₁ sin θ₁ = n₂ sin θ₂. With air as the first medium, sin θ₂ = (1.0003/1.33) sin 30° ≈ 0.376, so θ₂ ≈ sin⁻¹(0.376) ≈ 22°. The angle of refraction is therefore 22 degrees, choice D.

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