Define The Following :
1. Centre Of Curvature
2.Pole
3. Radius Of the Curvature
4. Principal Axis
5. Principal Focus
6. Focal Length
Answers
Explanation:
the centre of a circle which passes through a curve at a given point and has the same tangent and curvature at that point.
centre of curvature
the centre of curvature of a spherical mirror is the centre of the hollow sphere of glass of which is spherical mirror is a part
pole
the pole of spherical mirror is a centre of the mirror ie. reflecting surface
radius of curvature
the radius of curvature of a spherical mirror is the radius of the hollow sphere of glass of which the mirror is a part
principal Axis
the principal axis of a spherical mirror is a straight line passing through the centre of curvature and pole of the spherical mirror produced on both sides
principal focus
the principal focus of a concave mirror is a point on principal axis of the mirror at which the rays of light incident on the mirror in the direction parallel to the principal Axis actually meet after reflection from the mirror
focal length
focal length of mirror is a distance of principal focus of the mirror from the pole