A concave mirror cannot from

A concave mirror cannot be used as :

Assertion : Concave mirror can produce virtual image of virtual object. Reason : Convex mirror cannot form image of virtual object.

What is the difference in the shape of a concave mirror and a convex mirror ? Give one use of concave mirror and one of convex mirror.

An object is placed 42 cm, in front of a concave mirror of focal length 21 cm. Light from the concave mirror is reflected onto a small plane mirror 21 cm in front of the concave mirror Where is the final image?

An object is placed 42 cm, in front of a concave mirror of focal length 21 cm. Light from the concave mirror is reflected onto a small plane mirror 21 cm in front of the concave mirror Where is the final image?

When does a concave mirror from virtual image ?

For Concave Mirror

An object is at a distance of 10 cm from a concave mirror and the image of the object is at a distance of 30 cm from the mirror on the same side as that of the object. The radius of curvature of the concave mirror is