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JAMB Physics 1981 Question 17

Question 17

Refraction of Light

When a ray of light passes from water to glass, it is

  1. A.bent away from the normal
  2. B.bent towards the normal
  3. C.totally internally reflected
  4. D.absorbed by the glass
  5. E.broken into a pure spectrum.
Show the answer and explanation

Answer: B (bent towards the normal)

Explanation

Glass (n ≈ 1.5) is optically denser than water (n ≈ 1.33), so light slows down on entering glass and bends towards the normal.