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Indian Navy SSR The Human Eye and the Colourful World — practice questions

Explore 1 free The Human Eye and the Colourful World questions in Indian Navy SSR Science. Open each question or exercise to read its content, reference answers and available explanation.

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The Human Eye and the Colourful World questions and exercises with answers

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A bifocal lens used for presbyopia + myopia has:Read the answer and worked solution →

Worked practice questions

A bifocal lens used for presbyopia + myopia has:

  1. Upper convex portion and lower concave portion
  2. Upper concave portion and lower convex portion
  3. Two convex portions of equal power
  4. Two concave portions of equal power
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Correct answer: B. Upper concave portion and lower convex portion

1. Distant vision needs a concave lens, used for looking ahead — placed on top. 2. Near vision (reading) needs a convex lens — placed at the bottom. 3. The bifocal stacks the two together. _Source: syllabus Science, Ch 10 "The Human Eye and the Colourful World", §10.2_

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