Question

what are lens?????????​

Answer 1

Answer:

A lens is a transmissive optical divice that focusu or disperses a light beam by means of reflection .

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Answer 2

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.

A lens is a tool used to bring light to a fixed focal point. In a film camera, the lens sends the light to the film strip, while in a digital camera (like DSLRs or mirrorless cameras), the lens directs light to a digital sensor.

Lens. A Lens is a type of mirror which refracts the light instead of reflection. Refraction is the bending of a light when it enters a medium. Here the medium is Lens. Lens are of various types but the two most important types are convex (on Bi-convex) and concave.

Lens are curved shaped glasses that makes the things visible to us that are farther and nearer .... Lens focuses light to form a bigger or smaller image . There are two types of lens... Concave lens. Convex lens...

Lens: A lens is a piece of a refracting medium bounded by two surfaces, at least one of which is a curved surface. ... (i) Convex or converging lens: It is thicker at the centre than at the edges. It converges a parallel beam of light on refraction through it. It has a real focus.

The two most common types of lenses are concave and convex lenses, which are illustrated below in Figure 1. A common bi-convex lens is considered a positive lens because it causes light rays to converge, or concentrate, to form a real image.