Why does a concave mirror has a real principal focus?

+1 vote
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asked Jan 20, 2018 by Kundan kumar (49,132 points) 34 435 1342

Why does a concave mirror has a real principal focus?

1 Answer

+1 vote
answered Jan 20, 2018 by Vikash Kumar (144,729 points) 8 11 25
selected Jan 30, 2018 by faiz
 
Best answer

In a concave mirror, all the incident rays parallel to principal axis actually pass through the focus F after getting reflected from the concave mirror. Thus, concave mirror has a real principal focus.

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