RULES TO DRAW RAY DIAGRAMS FOR SPHERICAL MIRRORS Rule 1: The ray passing parallel to principal axis, after reflection passes through focus (or appears to be coming from focus in case of convex mirror) Rule 2: The ray passing through Focus (or appears to be passing through focus in case of convex mirror), after reflection becomes parallel to principal axis. Rule 3: The ray passing through principal axis comes back in the same path after reflection. ...
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