[Wikipedia excerpt: ‘…A mirror (“M”) is an object that reflects an image. Light that bounces off a “M” will show an image of whatever is in front of it, when focused through the lens of the eye or a camera. “M” reverse the direction of the image in an equal yet opposite angle from which the light shines upon it. This allows the viewer to see themselves or objects behind them, or even objects that are at an angle from them but out of their field of view, such as around a corner. Natural “M” have existed since prehistoric times, such as the surface of wa…].