Question

In a concave mirrior when an object is placed at the focus then the size of image

Answer 1

Answer:

Keeping the laws of reflection in a concave mirror in mind, we will now draw the ray diagram for a concave mirror when the object is at focus. As we can see, the image will be formed at infinity. Hence, point a is correct. Since, the image is formed at infinity, it will be highly magnified.