Question

Conclusion of spherical mirrors in human civilization

Answer 1

therefore conclude that mirrors are an optical tool whichformed images by gathering the light. There are two types ofmirror; the plane mirror having a flat reflecting surface and thespherical mirror which has a curved reflecting surface. In theexperiment, I observed that for plane mirrors the angle ofincidence is equal to the angle of reflection.The number of images formed is expressed by the equation,  where I is the number of image formed at a certainangle. As the angle increases, the number of images formeddecreases. Therefore, they are inversely proportional to eachother. These reflected rays intersect at a certain point called focalpoint. The focal length is the distance between the mirror and thefocal point. The focal length is equal to the one half of the radius ofthe curvature of the mirror.The focal length of the mirrordetermines how image will be projected or reflected by the mirrordepending on the distance from where the object is located, etc.

Answer 2

Convex lens is used in the retina of the human eye as a vision lens. Ciliary muscles hold the lens in a correct position in the eye. These muscles control the tension by which the lens are hold. When the eye focuses on a nearby object, the ciliary muscles contract, to reduce the tension in the ligaments and cause the lens to become more spherical. This is called lens accomodation.