Draw neat ray diagrams for a convex lens and state the characteristics of the image when:
The object is beyond $2{\mathrm{F}}_1$, but not at infinity.
 

Draw neat ray diagrams and state the characteristics of the image in case of a concave lens, when the object is at infinity.

Draw neat ray diagrams and state the characteristics of the image in case of a concave lens, when:

the object is anywhere between the optical centre and infinity.

Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for an object placed at $2{\mathrm{F}}_1$.