JAMB Physics 1985 Question 48

Question 48

Lenses and Optical Instruments

Which of the following statements is NOT correct?

  1. A.The average range of distinct vision for a normal eye is from the far distance (infinity) up to about 25 cm in front of the eye
  2. B.Longsighted people have difficulty in making the eye lens sufficiently powerful to focus on nearby objects.
  3. C.Shortsighted people cannot accommodate distant objects
  4. D.Longsighted people need diverging spectacle lenses
  5. E.A person with long sight has his eye-ball too short and the image of an object is therefore formed behind the retina.
Show the answer and explanation

Answer: D (Longsighted people need diverging spectacle lenses)

Explanation

Long sight is corrected with converging lenses, not diverging lenses.