Question

will you get a point image if you place a paper at the focus of a concave mirror?

Answer 1

No. We can never get a point size image of the object placed at the focus of the concave mirror as any object placed at the focus of the concave mirror would be highly magnified and not a point sized image. See the ray diagram in the picture attached

Answer 2

we will get point image

Explanation

When the light Rays come from infinity, the reflected rays meet at focus point.Then we get point image

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