JAMB Physics 2012 Question 34

Question 34

Refraction of Light

A glass block of thickness 10cm is placed on an object. If an observer views the object vertically, the displacement of the object is [glass = 1.5]

  1. A.3.33cm
  2. B.5.00cm
  3. C.6.67cm
  4. D.8.50cm.
Show the answer and explanation

Answer: A (3.33cm)

Explanation

Apparent depth = 10 ÷ 1.5 ≈ 6.67 cm, so the object appears raised by 10 − 6.67 ≈ 3.33 cm.