Question

the light from the sun is converged at a point in front of a concave mirror and appears as a sharp bright spot what is the point of the mirror

Answer 1

The light from the Sun is converged at a point, as a sharp, bright spot by the mirror. In fact, this spot of light is the image of the Sun on the sheet of paper. This point is the focus of the concave mirror. The heat produced due to the concentration of sunlight ignites the paper.

Answer 2

It would be the focus of the mirror as all the rays parallel to principal axis after reflection meet at a point called focus