A Circular Mirror is a laboratory instrument that consists of a flat or concave mirror with a circular shape. It is used in various experiments to study the reflection of light and the properties of mirrors. In physics and optics, the circular mirror is often used to study the reflection of light and to demonstrate the laws of reflection.

It is also used to investigate the formation of images by mirrors and to explore concepts such as focal length, magnification, and image size. In addition, circular mirrors are used in astronomy to reflect and focus light from telescopes, and in laser experiments to reflect and manipulate laser beams. Circular mirrors can also be used in practical applications, such as in the design of optical devices, mirrors used in cars or telescopes, and in the construction of solar concentrators.