Film begins with a masked intruder killing an elderly couple who reveals herself as their duplicate. Four friends discover a portal through a mirror connecting to different universes. They use the portal to complete their impossible software startup deadline. The group becomes successful in using the portal for various purposes
Mirror image is a reversed duplication of an object in a plane mirror. Results from specular reflection off lustrous surfaces like mirrors. Objects appear identical but reversed perpendicular to mirror surface
"Mirror, mirror on the wall" is a famous catchphrase from Snow White. The Wicked Queen owns the mirror and asks it daily. The mirror initially described Snow White as fairest in the land. The real quote is "Magic mirror on the wall, who's the fairest one of all?"
Angle of incidence is the angle between incident ray and normal at point of incidence. Incident ray hits surface, reflected ray gets back. Normal is perpendicular line drawn to point of incidence
Mirrors were used for ritual and function in Japanese culture. Technology for casting mirrors came from China during Yayoi period. Early mirrors were round with knobs, later became hand mirrors. Bronze mirrors declined with glass mirrors during Meiji period
Angle of incidence is formed between light ray and normal at surface. Incident ray strikes surface, reflected ray leaves. Normal is perpendicular line drawn from incident point. Law of reflection states incident and reflected angles are equal