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JAMB Physics 1988 Question 36

Question 36

Dispersion of Light and Colours

E, F and G are yellow, red and cyan transparent light filters respectively. The colour of a white opaque object when viewed through the arrangement of the filters above is

Diagram for this question
  1. A.yellow
  2. B.red
  3. C.black
  4. D.blue
Show the answer and explanation

Answer: C (black)

Explanation

The yellow filter passes red and green, the red filter then passes only red, and the cyan filter (green + blue) absorbs red. No light gets through, so the object looks black.