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Physics

For a spherical mirror, the focal length is …………… its radius of curvature.

  1. equal to
  2. half of
  3. twice of
  4. one-third of

Reflection

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Answer

half of

Reason — The focal length of a spherical mirror is equal to half of its radius of curvature i.e., f = 12\dfrac{1}{2}R

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