$A$ convex mirror can be used to see a large image of a small object.

Give one advantage of a spherical reflector over a plane reflector.

When a concave mirror produces a virtual and magnified image of an object,what is the object distance?

When an object is placed between the principal focus $(F)$ and the pole $(P)$ of a concave mirror,what kind of image is formed?

Draw ray diagrams showing the image formation by a concave mirror when an object is placed:
$(a)$ Between pole $(P)$ and focus $(F)$ of the mirror.
$(b)$ Between focus $(F)$ and centre of curvature $(C)$ of the mirror.
$(c)$ At centre of curvature $(C)$ of the mirror.
$(d)$ $A$ little beyond centre of curvature $(C)$ of the mirror.
$(e)$ At infinity.

State the sign convention used to measure the length of the image and the object.