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  9. Q408

RRB Technician (Grade I Signal + Grade III) 2024 · Question 408 of 1214

Which of the following is correct about the relationship between power and focal length of a lens?

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  1. APower is inversely proportional to square of the focal length.
  2. BPower is directly proportional to square of the focal length.
  3. CPower is directly proportional to focal length.
  4. DPower is inversely proportional to focal length.Correct

Answer: D. Power is inversely proportional to focal length.

Official answer key verified. Detailed explanation coming soon.

Source: RRB Technician Grade 3 GK Questions: 24 Dec Shift 2 (12:45 PM - 2:15 PM) (testpaper.org compilation) · memory-based

← Q407View full paper (1214 questions)Q409 →

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