Show that for a spherical concave mirror
`f=R/2`.

Show that for a spherical convex mirror f=R/2 .

What is concave mirror

Define a spherical mirror.

Draw a ray diagram to show the image formation by a concave mirror, when the object is kept between its focus and the pole.

Draw a ray diagram to show image formation when the concave mirror produces a real, inverted and magnified image of the object.

Define the terms:Spherical mirror

Define the principal focus of concave mirror.