contestada

The focal point is the point through which parallel incident rays reflecting off the surface of a concave mirror converge. Is this true or false?

Respuesta :

When a beam of rays that are parallel to the principal axis is incident on a concave mirror converges at the focal point.

But, if any other set of parallel rays that are not parallel to the principal axis is incident on a concave mirror they will not converge at the focal point. They will converge at a distance of focal length, but not on the focal point.

Thus the given statement is not true.