Question

Distinguish between a virtual image and a real image.

Answer 1

While real image appears inverted, virtual image appears erect
While real image can be obtained on a screen, virtual image cannot be seen on a screen.
In case of mirrors, real image lies in front while virtual image lies behind the mirror.
In case of lenses, real image lies on the other side of the object whereas virtual image lies on the same side of the object .
for more reading http://www.differencebetween.com/difference-between-virtual-and-vs-real-images/