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Question 20207
JEE Physics · Medium

Ray Optics: Object at F — Concave Mirror MCQ

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Object at F — Concave MirrorMediumQuestion 20207

Question

Object at the focus F of a concave mirror produces image at:
  1. A
    C
  2. B
    Between F and P
  3. C
    Infinity
    Correct
  4. D
    F itself

Correct answer

Infinity

Explanation

At u = f: 1/v = 1/f − 1/f = 0 → v = ∞. Reflected rays are parallel. Used in searchlight reflectors: source at F → parallel beam.

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