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It is normal for the mirror at its pole. Aperture: The diameter of the spherical mirror is called its aperture. It represents the reflecting surface of the mirror. Focus: It is the point of the principal axis at which the rays parallel to the principal axis meet (concave mirror) or appear to meet (convex mirror) after reflection. It is ...
- Centre of Curvature (C)
- Radius of Curvature (R)
- Pole (P)
- Principal Axis
- Aperture
- Focal Plane
- Focal Length
- Relation Between Radius of Curvature and Focal Length of A Spherical Mirror
- Related Topics
- Concave and Convex Mirror
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 fig...
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 c...
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.
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.
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.
A plane passing through the principal focus and at right angles to the principal axis of a spherical mirror is called its focal plane.
The distance between the pole and the focus is called the focal length. The focal length is half the radius of curvature.
For spherical mirror having small aperture, the principal focus ‘F’ lies exactly at the mid point of the pole P and the centre of curvature C as shown in the figure 12 & 13. Therefore the focal length of a spherical mirror (concave or convex) is equal to half of its radius of curvature. i.e.
Convex mirror is a spherical mirror, whose inner (cave type) surface is silvered and reflection takes place at the outer (convex) surface. Concave mirror is a spherical mirror, whose outer bulged surface is silvered and reflection takes place from the inner hollow (cave type) surface. Rules for the formation of images by concave & convex mirrors: (...
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A concave mirror can be thought of as a slice of a sphere. The line passing through the center of the sphere and attaching to the mirror is known as the principal axis. The point in the center of the sphere is the center of curvature. The point on the mirror's surface where the principal axis meets the mirror is known as the vertex.
The centre of the reflecting surface of a mirror is called the Pole(P). It lies ON the mirror. This is different from the Centre of curvature(R). Each spherical mirror forms a part of an imaginary circle. The centre of this circle is called Centre of curvature. It DOES NOT lie on the mirror.
- 9 min
- Mahesh Shenoy
- if curvatur is increased, focal length will decrease
- a mirror can have an aperture smaller than the focal length , there are mirrors present where the f=10cm, and the aperture is 8cm!!
- Think logically! The only way to make the focal length longer is making the mirror less curved. If we make it less curved, then the sphere which it...
- Aperture is the *diameter of mirror/lens* from one end to another. Hope you get my point. :)
- The centre of curvature is the centre of the sphere from which the mirror is cut. The midpoint of the aperture is the pole of the mirror.
- If the spherical mirror starts curving in then the radius of the sphere decreases which then affects the focal length too.
Sep 12, 2022 · Curved Mirrors. We can define two general types of spherical mirrors. If the reflecting surface is the outer side of the sphere, the mirror is called a convex mirror. If the inside surface is the reflecting surface, it is called a concave mirror. Symmetry is one of the major hallmarks of many optical devices, including mirrors and lenses.
Locations in front of a spherical mirror (or a plane mirror, for that matter) are assigned positive coordinate values. Those behind, negative. 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).
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