The 6 terms related with spherical mirror and explain each of them?
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Answer:
SOME IMPORTANT TERMS RELATED TO SPHERICAL MIRRORS
Some Important Terms Related To Spherical Mirrors
CENTRE OF CURVATURE (C):
The centre of curvature of a spherical mirror is the centre of the imaginary hollow sphere of glass, of which the spherical mirror is a part. The centre of curvature is usually denoted by the letter C. The centre of curvature of a concave mirror is in front of it and the centre of curvature of convex mirror is behind the mirrors as shown in the figure.
RADIUS OF CURVATURE (R):
The radius of curvature of a spherical mirror is the radius of the imaginary hollow sphere of glass, of which the spherical mirror is a part. The radius of curvature is usually denoted by the letter ‘R’.
In figure above the distance PC is the radius of curvature of a concave mirror and in figure (b) the distance PC is the radius of curvature of a convex mirror.
POLE (P) :
The centre of the reflecting surface of a spherical mirror is called its pole. It is usually denoted by the letter ‘P’ in each concave and convex mirror. The pole of a spherical mirror lies on the surface of the mirror.
PRINCIPAL AXIS:
The principal axis of a spherical mirror is the straight line passing through the centre of curvature C and pole P of a spherical mirror, produced on both sides.
APERTURE:
The portion of a mirror from which the reflection of light actually takes place is called the aperture of the mirror. It is also called linear aperture of the mirror. The aperture of a spherical mirror is denoted by the diameter of its reflecting surface.
Some Important Terms Related To Spherical Mirrors
In fact the aperture of a mirror represents the size of the mirror.
FOCAL PLANE:
A plane passing through the principal focus and at right angles to the principal axis of a spherical mirror is called its focal plane.
FOCAL LENGTH:
The distance between the pole and the focus is called the focal length. The focal length is half the radius of curvature.
PRINCIPAL FOCUS:
Focus of concave mirror
Focus of convex mirror
A parallel beam of light after reflectioin from a concave mirror converges at a point in front of the mirror. This point (F) is the focus of a concave mirror it is real.
A parallel beam of light after reflectioin from a convex surface diverges and the rays do not meet. However on producing backward, the rays appear to meet at a point behind the mirror. This point is focus of the convex mirror and it is virtual.
Explanation:
Terms related to spherical mirrors
Radius of curvature (R): Radius of the sphere of which the mirror is a part. Pole (P/O): Geometric centre of the spherical surface of the mirror. Principal axis: Straight line joining the pole of the mirror to its centre of curvature.