WAEC Physics 2016 Objective — Question 29
Question 29 of 50 from the West African Examinations Council (WAEC) Physics 2016 Objective paper, with the correct answer and a full explanation.
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29. Total internal reflection I. is a phenomenon of refraction of light. II. occurs when light rays travel into a denser medium. III. occurs when the critical angle is just exceeded. IV. is a phenomenon of reflection of light. Which of the statements above are correct? A. I and II only B. I and III only C. I, II and III only D. I, III and IV only
- A. I and II only
- B. I and III only
- C. I, II and III only
- D. I, III and IV onlyCorrect
Explanation
Total internal reflection occurs when light travels from an optically denser to a less dense medium and the angle of incidence exceeds the critical angle; it is a phenomenon of both refraction and reflection of light.
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