Question

What is a concave mirror?​

Answer 1

Answer:

A concave mirror is one that has a real focal point (not virtual). How an image in that mirror would be perceived would depend on whether or not the observer is between the mirror the the focal point, at the focal point, or on the opposite side of the focal point from the mirror’s surface. It is also dependent on the vergence of the light falling on the mirror (parallel rays, divergent, or convergent).