Science & Technology·Prelims Questions
Lenses and Mirrors — Prelims Questions
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Version 1Updated 9 Mar 2026
Q1medium
Consider the following statements regarding optical instruments: 1. A convex lens is used to correct myopia. 2. A concave mirror is used in solar furnaces. 3. A convex mirror provides a wider field of view and is used as a rearview mirror in vehicles. Which of the statements given above is/are correct?
Q2easy
A person is suffering from presbyopia. Which type of lens is typically prescribed to correct this condition?
Q3medium
Which of the following optical phenomena is primarily responsible for the working of optical fibers?