what is focus of concave mirror
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A concave mirror, or converging mirror, has a reflecting surface that bulges inward (away from the incident light). These mirrors are called "converging mirrors" because they tend to collect light that falls on them, refocusing parallel incoming rays toward a focus.
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Focus of concave mirror is always negative.
pranjal7:
Focus of concave mirror is a point where ray coming from infinity or parallel to infity meets.
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