Question

What should be the position of an object to get a virtual image by a concave lens ?​

Answer 1

Answer :

=> To get a virtual image in concave mirror , then the object must be placed b/w ( between ) F and P.

=> F stands for focus.

=> P stands for pole.

=> F is the point where the marginal rays meet in concave mirror and tend or appear to meet in convex mirror.

=> P is the geometric centre of the spherical mirror( here : concave mirror )