Optical lens manufacturer - Comparison of virtual images formed by plane mirrors, When the distance between the object and the convex lens is greater than the focal length of the lens, the object becomes an inverted image. When the object approaches the lens from a distance, the image becomes larger and the distance from the image to the lens becomes larger; When the distance between the object and the lens is less than the focal length, the object becomes an enlarged image. This image is not the meeting point of the actual refraction light, but the intersection of their reverse extension lines. It can not be received by the light screen and is a virtual image. The virtual image contrast formed by the plane mirror (can not be received by the light screen, can only be seen by the eyes).
