Define Aperture and Principal axis of a mirror.
Answers
Answer:
Every point on the mirror surface lies at same distance from it. 4. Aperture: The diameter of the circular rim of the mirror, is called the aperture of the mirror. 5. Principle Axis: The straight line passing through the pole P and the centre of curvature C of the mirror, is called principal axis of the mirror.
Answer:
In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An optical system typically has many openings or structures that limit the ray bundles.
The principal axis of a spherical mirror is a line going through the center of the mirror that is exactly perpendicular (sometimes said "normal") to the surface of the mirror. By definition, a spherical mirror is rotationally symmetrical around its principal axis.
Hope it will help you .