Can I put a mirror at the door? Did you pay attention to putting a mirror at the door?

A mirror is an object with a smooth surface and can reflect light. At first, the ancients used polished bronze as mirrors. There are two kinds of mirrors: flat mirror and curved mirror. Flat mirrors are often used to tidy up the appearance, and curved mirrors are divided into concave mirror and convex mirrors, which are mainly used as dressing mirrors, furniture accessories, architectural decoration parts, optical instruments, solar cookers, reflectors for headlights and searchlights, reflecting telescope, car rearview mirrors, etc.