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Multiple Choice Question

The power of a lens is defined as:

  • A
    The reciprocal of its focal length in meters
  • B
    The ratio of image distance to object distance
  • C
    The product of its focal length and refractive index
  • D
    The square of its focal length
Explanation:
Power (P) = 1/f (in meters). Unit is dioptre.

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This question belongs to the set "RRB Group D 2025 Question Paper – 27 November Shift 1 | Set 1 (Q1–Q25) General Science". Click below to read detailed notes and attempt the full quiz.

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