Question

define pole centre of curvature of physics radius of curvature focus focal length

Answer 1

Answer:

The distance from the pole to the center of curvature is called (no surprise, I hope) the radius of curvature (r). The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature.

Explanation:

THANK U

Answer 2

Answer:

Pole: The centre of the reflecting surface of a spherical mirror is a point called the pole.\

Centre of curvature: It is the point at the centre of the circlee or sphere of which the the mirror is a part.

Radius of curvature: The distance between the center of curvature and pole of a spherical mirror is called radius of curvature.

Focus:  A number of rays parallel to the principal axis after reflection from a concave mirror meet at a point on the principal axis or appear to come from a point after reflection from a convex mirror on the principal axis. This is called principal focus.

Focal lenght: The distance b/w the pole and the focus is called focal length.

Explanation:

Hope it helps :)