Final answer:
Without light in a dark room, a mirror cannot reflect any images, so you will not see a reflection of yourself. Mirrors require light to reflect virtual images, which are not present in the absence of light.
Step-by-step explanation:
In a completely dark room, if you hold up a mirror in front of you, you will not see a reflection of yourself in the mirror. This is because mirrors work by reflecting light; when light rays hit the surface of a mirror, they are bounced back at the same angle, allowing us to see an image of whatever is casting the light. In a dark room, there is no light to reflect, and as a result, your mirror will not show any reflection.
Although a high-quality mirror can reflect more than 90% of the light that falls on it, in the absence of light, this capability is irrelevant. The reflections we see in mirrors are virtual images, which means that they appear to be behind the mirror's surface. Virtual images are created by the mirror's ability to reflect light, forming an image that can be photographed and videotaped, just as our eyes can see them. However, without light, no image will form at all.