Final answer:
Symmetry in the context of mirrors refers to the formation of an image that is a mirror image of the object, created according to the law of reflection. A virtual image is formed behind the mirror, appearing upright and at the same size and distance from the mirror as the actual object.
Step-by-step explanation:
When an imaginary line is drawn down the center of the face resulting in the two sides forming a mirror image of one another, this is known as symmetry. In physics, particularly in the study of optics, this concept is illustrated when using mirrors. When an object is placed in front of a mirror, an image is formed that appears to be behind the mirror due to the law of reflection. The resulting image is virtual, meaning it cannot be projected onto a screen since the light rays do not actually come from the point at which the image seems to be located.
For instance, when two mirrors are placed parallel to each other and an object is situated between them off-center, an infinite number of images can appear. Each image formed is reversed front to back (such as in the case of a right-hand glove appearing as a left-hand glove in a mirror) and is the same size and upright just as the actual object.
The law of reflection states that the angle of incidence equals the angle of reflection, allowing us to conclude that the distance between the object and the mirror is exactly the same as the distance between the mirror and the image. These principles are the reason why your image in a bathroom mirror appears to be directly behind the glass at the same distance as you are from the mirror.