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Question 20244
JEE Physics · Hard

Ray Optics: Newton's Mirror Formula MCQ

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Newton's Mirror FormulaHardQuestion 20244

Question

Newton's formula for a mirror: x₁x₂ = f² where x₁ and x₂ are object and image distances from focus. If object is 4f from focus, image distance from focus is:
  1. A
    f/4
    Correct
  2. B
    f/16
  3. C
    4f
  4. D
    f

Correct answer

f/4

Explanation

x₁x₂ = f² → x₂ = f²/x₁ = f²/(4f) = f/4.

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