A projector is an optical device used to display enlarged images, whether still photographs, slides, or motion pictures, onto a screen or surface. It works by shining a light through a transparent image or reflecting it from an opaque source, then focusing and enlarging the image for viewing by an audience.
Projectors are widely used in photography, cinema, presentations, and educational settings, allowing small images or film frames to be viewed at large scale. Modern projectors may employ digital imaging, LCD, or DLP technology, providing bright, sharp, and colour-accurate projections for professional and recreational purposes.