A film projector is a device used to display moving images from a film reel onto a screen. It works by shining a bright light through the film, which is made up of a series of still images. As the film moves, these images are projected in rapid succession, creating the illusion of motion. Film projectors are commonly used in cinemas and for home movie screenings. The technology behind film projectors has evolved over the years, with various types such as 16mm and 35mm projectors catering to different film formats. While digital projectors have become more popular, traditional film projectors are still appreciated for their unique aesthetic and historical significance in the world of cinema.