The focus in terms of a parabolic mirror is where:

All the parallel incident rays meet

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All the parallel reflected rays meet

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All the parallel reflected rays appear to meet

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All the parallel incident rays appear to meet

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Solution

The correct options are
B
All the parallel reflected rays meet

C
All the parallel reflected rays appear to meet

The focus for a parabolic mirror is defined as the point where all the parallel incident rays meet or appear to meet.

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