PhysicsLight: refractionJAMB
A ray in air strikes a glass surface at an angle of incidence of 60° and is refracted at 30°. Find the refractive index of the glass.
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Answer: D. √3
n = sin 60°/sin 30° = (√3/2) ÷ ½ = √3 ≈ 1.73.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.