Post-UTME Physics 2017 Objective — Question 12
Question 12 of 20 from the Post-UTME Screening (Post-UTME) Physics 2017 Objective paper, with the correct answer and a full explanation.
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An object at the bottom of a sheet of glass of thickness 6.6mm appears to be displaced by 2.1mm when viewed from above. What is the refractive index of the glass?
- A. 1.50
- B. 1.47Correct
- C. 1.40
- D. 1.33
Explanation
Apparent displacement = t(1-1/n). 2.1 = 6.6(1-1/n). Solving gives n approximately 1.47.
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