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What is terminology of concave mirror …

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What is terminology of concave mirror and convex mirror
  • 1 answers

Meghna Thapar 5 years, 10 months ago

  • Some terms related to spherical mirrors:
  1. The centre  of  curvature  (C) of  a  spherical  mirror  is  the  centre  of  the hollow  sphere  of  glass,  of which the spherical mirror is a part.
  2. The radius  of  curvature  (R) of  a  spherical  mirror  is  the  radius  of  the  hollow  sphere  of  glass,  of which the spherical mirror is a part.
  3. The pole (P) of a spherical mirror is the centre of the mirror.
  4. The principal axis of a spherical mirror is a straight line passing through the centre of curvature C and pole P of the spherical mirror.
  5. The principal focus (F) of a concave mirror is a point on the principal axis at which the rays of light incident on the mirror, in a direction parallel to the principal axis, actually meet after reflection from the mirror.
  6. The principal focus (F) of a convex mirror is a point on the principal axis from which the rays of light  incident  on  the  mirror, in  a  direction  parallel  to  the  principal  axis, appear  to  diverge  after reflection from the mirror.
  7. The focal length (f) of a mirror is the distance between its pole (P) and principal focus (F).

For spherical mirrors of small aperture, R = 2f.

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