By which method you get a virtual image by using a concave mirror ?

How do you get a virtual image using a concave mirror?

How do you get a virtual image using a concave mirror ?

What is a concave mirror ?

The image formed by a concave mirror

What is a virtual image ?

Would you be able to burn a paper using concave mirror ?

We wish to obtain an erect image of an object using a concave mirror of focal length of 15 cm. What should be range of distance of the object from the mirror ? What is the nature of the image ? Is the image larger or smaller than the object ?

At where the object is placed to get a virtual image in front of concave mirror.