In torches,searchlights,and headlights of vehicles,the bulb is placed:

For which type of mirror will the image always be erect,regardless of the distance at which the object is placed?

If an object is placed between two plane mirrors inclined at an angle of $45^{\circ}$,then the number of images formed will be $9$. State whether this statement is True or False.

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

Is it possible for a lens to act as a convergent lens in one medium and a divergent lens in another?

Which type of image cannot be obtained by a concave mirror?