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JAMB Physics 1994 Question 36

Question 36

Refraction of Light

An object is placed directly below a glass block of thickness 3.0cm. Calculate the lateral displacement of the object if the refractive index of the glass is 1.5.

  1. A.1.0cm
  2. B.1.5cm
  3. C.2.0cm
  4. D.2.5cm
Show the answer and explanation

Answer: A (1.0cm)

Explanation

Apparent depth = 3.0 ÷ 1.5 = 2.0 cm, so the object appears raised by 3.0 − 2.0 = 1.0 cm.