Question

Define pole, the centre of curvature, the radius of curvature, principal axis, aperture, focus and focal length of a spherical mirror.

Answer 1

Hint: A mirror having a curved reflecting surface is known as a curved mirror. The surface might be convex (bulging outward) or concave (bulging inward) (recessed inward). The surfaces of most curved mirrors are formed like a portion of a sphere, although different forms are occasionally employed in optical equipment. Because spherical mirror systems, like spherical lenses, suffer from spherical aberration, the most popular non-spherical form is parabolic reflectors, which are used in optical equipment such as reflecting telescopes that require to picture distant objects.

Complete answer:
The centre of the reflecting surface is referred to as the pole. The letter P stands for it.
Centre of Curvature: The centre of the sphere of which the mirror forms the part. The letter "C" stands for this.
The radius of the sphere, of which the mirror is a part, is called the radius of curvature. The letter "R" stands for "Representation."
The straight line connecting the pole (P) with the centre of curvature is known as the principal axis. The mirror at its pole appears to be normal.
Aperture: The aperture of a spherical mirror is its diameter. The mirror's reflecting surface.
After reflection, the focus is the point on the primary axis where the rays parallel to the principal axis meet (concave mirror) or seem to meet (convex mirror). F.
Focal Length: The focal length of a spherical mirror is the distance between the pole and the primary focus. Represented by f.

Note: The majority of curved mirrors have a spherical shape. These are the easiest to manufacture and are the greatest form for all-around use. Spherical mirrors, on the other hand, have spherical aberration, which means that parallel rays reflected from them do not concentrate to a single point. A parabolic reflector is excellent for parallel rays, such as those originating from a very far object. Incoming parallel rays may be focused to a considerably smaller point with this mirror than with a spherical mirror. A toroidal reflector is a type of parabolic reflector with varying focal distances based on mirror angle.