WBCS.LIVE practice question

If ‘u’ is the object-distance, ‘v’ is the image-distance and ‘f’ is the focal length of a spherical mirror then which of the following is a correct expression for the mirror formula?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 1/v+1/u=−1/f
  2. 1/v−1/u=1/f
  3. 1/v+1/u=1/f
  4. 1/v−1/u=−1/f

Correct answer and explanation

Correct answer: 1/v+1/u=1/f