passwella.
Menu

JAMB Physics 2010 Question 30

Question 30

Refraction of Light

An object is embedded in a block of ice, 10 cm below the plane surface. If the refractive index of the ice is 1.50, the apparent depth of the object below the surface is

  1. A.6.77 cm.
  2. B.7.63 cm.
  3. C.7.50cm.
  4. D.2.50cm.
Show the answer and explanation

Answer: A (6.77 cm.)

Explanation

Apparent depth = real depth ÷ refractive index = 10 ÷ 1.5 ≈ 6.67 cm, which is option A.