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Question 20195
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Ray Optics: Mirror — Object at Centre of Curvature MCQ

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Mirror — Object at Centre of CurvatureEasyQuestion 20195

Question

When an object is placed at the centre of curvature C of a concave mirror, the image is formed:
  1. A
    At focus F
  2. B
    At infinity
  3. C
    At C itself
    Correct
  4. D
    Between C and F

Correct answer

At C itself

Explanation

Object at C (u = R = 2f): from mirror formula 1/v = 1/f − 1/u = 1/f − 1/(2f) = 1/(2f) → v = 2f = R = C. Image at C: real, inverted, same size (m = −1).

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