Terms Related to Mirror
Some of the important terms related to mirror, are as follows.
- Pole: The centre point of the mirror through which the principal axis passes through the mirror is called the pole.
- Principal axis: The straight line that passes through the pole and the centre of curvature is called the principal axis.
- Centre of curvature: The centre of the sphere of which the mirror or lens is a part is called the centre of curvature.
- Radius of curvature: The radius of the sphere of which the mirror or the lens is a part is called the radius of curvature.
- Focal point or focus: It is a point at which all the rays parallel to principal axis meet after reflection.
- Focal length: The distance from the pole to the focal point is called the focal length.
Ray Optics – Definition, Formula, Applications
Ray Optics is the study of properties of light and optical instruments by assuming that light travels in a straight line. It is also known as geometrical optics, which deals with the geometry of light. Light always travels in a straight line, and the direction in which the light rays propagate is called the ray of light. It studies the principles and laws governing the propagation of light, particularly in the absence of wave effects such as interference and diffraction.
In this article, we will learn about ray optics, reflection, refraction, concave and convex mirrors, lenses, and formulas related to them.
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