Question

the point on principal axis at which parallel rays coming from infinity coverage after reflection is called the
a) principal focus
b) aperture
c) principal axis
d) focal length
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Answer 1

Answer:

principal focus

Explanation:

Focus or Principal Focus: The point on a principal axis which parallel rays; originating from infinity; meet after reflection is known as the Focus or Principal Focus of the round mirror. It is signified by letter “F” .

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Answer 2

Answer:

The point of principal axis at which parallel rays coming from infinity coverage after reflection is called the Principal focus.