JAMB Physics 2025 Objective — Question 3
Question 3 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.
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A ray of light is incident at 30° on a surface with refractive index 1.5. What is the angle of refraction? (n_air=1)
- A. 20°
- B. 42°
- C. 19.5°Correct
- D. 22.6°
Explanation
Snell's law: sin θ₂=sin30°/1.5=0.3333 → θ₂≈19.5°.
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