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JAMB Physics 1989 Question 27

Question 27

Light and Reflection

The plane mirrors in a kaleidoscope are usually placed

  1. A.at an angle of 60°
  2. B.parallel to one another
  3. C.perpendicular to one another
  4. D.at an angle of 45°.
Show the answer and explanation

Answer: A (at an angle of 60°)

Explanation

Kaleidoscope mirrors are set at 60°, giving 360/60 − 1 = 5 images that form a symmetrical pattern.