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Question 77Asked in RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)

How can you experimentally determine the focal length of a concave mirror?

  1. AMeasure the angle of reflection.
  2. BMeasure the diameter of the mirror.
  3. CMeasure the distance between the mirror and the image of a distant object formed by it.
  4. DMeasure the distance between the pole and the centre of curvature.
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Correct answer: (C) Measure the distance between the mirror and the image of a distant object formed by it.

From RRB JE CBT-1 PYQ 17 Dec 2024, Shift 3 (4:30 PM)

This is question 77 of RRB JE CBT-1 PYQ 17 Dec 2024, Shift 3 (4:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.