A camera is a device designed to capture and record images or videos. It uses a combination of optics and electronics to focus light onto a light-sensitive sensor or film. The light entering the lens is processed and transformed into an electronic signal that is then stored as a digital image file. Cameras come in various types such as digital, film, DSLR, mirrorless, and action cameras, each with its own unique features and capabilities. They are widely used in photography, videography, surveillance, and various other applications where capturing visual information is essential.