Unilorin Post-UTME Physics 2022 (Model questions) Question 7

Question 7

Dispersion of Light and Colours

Which of the following would appear when a white screen is illuminated by red and green light?

  1. A.Red
  2. B.Purple
  3. C.Yellow
  4. D.Green
Show the answer and explanation

Answer: C (Yellow)

Explanation

Adding the primary colours red and green light gives the secondary colour yellow.