What is a real image? Name the mirror which can be used to obtain the real image of an object. What should be the position of the object relative to the mirror?

A real image is formed when the reflected rays actually meet at a point. It can be obtained on a screen.

Concave mirror is used to obtain the real image of an object. If the object is located at any position except between pole and focus of the concave mirror than the image formed is real.