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State the two convenient rays that are c...

State the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain your answer with the help of suitable ray diagrams.

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Two convenient rays those are chosen to construct the image by a spherical mirror: (i) A ray passing through the centre of curvature: A ray of light passing through the centre of curvature of a concave mirror or a ray directed in the direction of centre of curvature of a convex mirror is reflected retraces the path after reflection.


(ii)A ray parallel to the principal axis: A ray of light parallel to the principal axis, after reflection passes through the principal focus in case of a concave mirror or appears to diverge from focus in case of convex mirror.
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