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Concepts Of Physics MCQ Edition [Volume 1]PhysicsOptical Instruments

A person Vikram can clearly see objects situated between 25 cm and 200 cm . Which of the following may represent the range of clear vision for Rohan, who has stronger muscles than Vikram, but all other parameters of his eye are identical to those of Vikram?

Options

  1. A18 cm to 300 cm
  2. B25 cm to 300 cm
  3. C18 cm to 200 cm
  4. D25 cm to 200 cm

Correct answer

C. 18 cm to 200 cm

Step-by-step solution

The near point of an eye is determined by the maximum accommodation power of the eye lens, which is achieved when the ciliary muscles are fully contracted. Stronger ciliary muscles can contract more, increasing the maximum curvature and power of the eye lens. This allows the eye to focus on closer objects, decreasing the near point distance. Thus, Rohan's near point will be less than 25 cm . The far point is determined by the minimum power of the eye lens, which occurs when the ciliary muscles are fully relaxed. Si

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