What is the primary purpose of a lens in a projector?

The primary purpose of a lens in a projector is to magnify and focus an image onto a larger surface. In a projector, light is emitted from a source and passed through a lens system that manipulates the light rays. The lens converges these rays to create a clear and enlarged image on a screen. This process enables the projection of larger images that remain sharp and detailed, making it possible to display visual content for an audience effectively.

The lens's ability to focus light specifically allows for the projection of a smaller image onto a larger surface while maintaining clarity, which is vital for presentations, movies, and other visual displays. This magnification process is crucial for achieving the desired size and definition of the projected image, ensuring that the audience can see it clearly at a distance.