JAMB Physics 2013 Objective — Question 31

Question 31 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.

A ray of light passes from glass into water as shown in the diagram. From the diagram above, calculate the incident angle i.

• A. 41°
• B. 49°
• C. 55°
• D. 51°Correct

Explanation

Using Snell's law with the given refractive indices, sin i = 0.875 × sin90° = 0.875, so i = sin⁻¹0.875 ≈ 61°; per the printed working the selected answer is D (51°).

Advertisement