Through which of the following points will a ray passing through the centre of curvature and reflected by a concave mirror pass?

If the image formed by a convex lens is of the same size as that of the object,what is the position and nature of the image with respect to the lens?

For a concave mirror,if the object distance $u = \infty$,then the image distance $v = ..........$.

How can you distinguish between a plane mirror,a convex mirror,and a concave mirror by merely looking at the image formed in each case?

In Section $I$, the magnification of the image obtained by placing an object at various distances in front of a concave mirror is mentioned, and in Section $II$, the type and size of the image are mentioned. Which of the following is the correct pair connecting Section $I$ and Section $II$?

Section $I$	Section $II$
$1.$ Magnification $(-1)$	$a.$ Real and enlarged
$2.$ Magnification $(+5)$	$b.$ Real and same size as object
$3.$ Magnification $(-5)$	$c.$ Real and diminished
$4.$ Magnification $(-0.5)$	$d.$ Virtual and enlarged

If the magnification $m$ of an image formed by a spherical mirror is negative,what is the nature of the image?