Question

In a concave mirror, when the object is placed at infinity which of the following applies to the image?

(a) Real, inverted image of the same size at centre of curvature

(b) Real, inverted, highly diminished image at focus

(c) Real, inverted, highly enlarged image at centre of curvature

(d) Real, inverted, diminished image between centre of curvature C and principal focus F

Answer 1

(b) Real, inverted, highly diminished image at focus

If an object is at infinity from a concave mirror, the parallel rays of light, after reflection converge at focus. Hence, the image formed is at the focus of the mirror.