InterviewSolution
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InterviewSolution
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Define the following terms in the context of spherical mirrors :(i) Pole(ii) Centre of curvature(iii) Radius of curvature(iv) Principal axis(v) Principal focus |
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Answer» Solution :(i) Pole : The centre of the reflecting surface of a spherical mirror. (ii) Centre of curvature : The reflecting surface of a spherical mirror is PART of a sphere. The centre of that centre of that sphere is called centre of curvature. (iii) Radius of curvature : The radius of the sphere from which a mirror is made. (iv) Principal AXIS : An imaginary line passing through the pole and the centre of curvature. The principal axis is NORMAL to the mirror at the pole. (v) Principal focus : The point on the principal axis, at which incident light rays PARALLEL to the principal axis converge or appear to diverge froms, is called the principal focus of the lens. |
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