3D movies are films that create the illusion of depth, making the viewing experience more immersive. They use special technology to project images that appear to pop out of the screen, allowing viewers to feel as if they are part of the action. This effect is achieved through the use of stereoscopic imaging, which combines two slightly different images to simulate how human eyes perceive depth. To watch a 3D movie, viewers typically wear 3D glasses that filter the images for each eye. This technology has become popular in theaters and home entertainment systems, enhancing genres like action, animation, and horror. The goal is to provide a more engaging and realistic experience for audiences.