With the help of a labelled ray-diagram, describe how a plane mirror forms an image of a point source of light placed in front of it. State the characteristics of the image formed in a plane mirror.
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Consider a point source of light O placed in front of a plane mirror MM'. ... Another ray of light OB coming from O strikes the mirror at point B and gets reflected in the direction BY. Rays AX and BY, on producing backwards, meet at point I behind the mirror; which is the image of point source O.
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