PhysicsLight: refractionWAEC
Light passes from air into glass of refractive index 1.5 at an angle of incidence of 30°. Find the angle of refraction.
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Answer: A. 19.5°
sin r = sin 30°/1.5 = 0.5/1.5 = 0.333, so r ≈ 19.5°.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.