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JAMB Physics 1983 Question 45

Question 45

Light and Reflection

PQ is a thin rod on a horizontal table, RS is a plane mirror inclined at 45° to the horizontal as shown in Fig. 10 above. The image of PQ as seen in the mirror by the eye, T is

  1. A.horizontal
  2. B.parallel to the mirror
  3. C.at infinity
  4. D.vertical
  5. E.highly magnified
Show the answer and explanation

Answer: D (vertical)

Explanation

A plane mirror forms the image as far behind the mirror as the object is in front. A mirror at 45° turns the horizontal rod's image through 90°, so the image is vertical.