Question

a concave mirror forms a point sized image for an object at????

Answer 1

when the object is at infinity and the image is at focus

Answer 2

Answer:

When the object is placed at "infinity", concave mirror forms a point sized image.

Explanation:

A concave mirror is a converging mirror, which means that the rays which fall upon the mirror gets converged and hence making the focus of the concave mirror as real.

A concave mirror is curved inward in the middle.

Now if we keep an object at the infinity we find that the image formed will be at the focus of the mirror and the looks like a point.

Because the rays coming from the object which is at the infinity will be parallel to the principle axis, hence the rays which are parallel to the principle axis must pass through the focus of the mirror, and as the rays converge at one point we get point sized image.

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