The image seen in a plane mirror is located
A. at the surface of the mirror
B. behind the mirror
C. in front of the mirror
D. at the position of the object
The correct answer and explanation is :
The correct answer is B. behind the mirror.
In a plane mirror, the image formed is virtual and appears to be located behind the mirror. This is a fundamental property of plane mirrors that results from the way light rays reflect off the surface.
Here’s a breakdown of how it works:
Reflection in a Plane Mirror:
When light strikes a plane mirror, it reflects according to the law of reflection, which states that the angle of incidence (the angle between the incoming light ray and the mirror’s surface) equals the angle of reflection (the angle between the reflected ray and the mirror’s surface). These reflected rays never actually converge; however, they appear to diverge from a point behind the mirror.
Virtual Image:
The light rays that are reflected from the mirror seem to be coming from a point behind the mirror, but in reality, they do not physically meet at this point. The human eye extends these reflected rays backward in straight lines, perceiving them as if they are coming from a location behind the mirror. This is called a virtual image because it cannot be projected onto a screen or captured by any physical means.
Characteristics of the Image:
- Upright: The image appears right-side up, maintaining the same orientation as the object.
- Same Size: The image formed is of the same size as the object.
- Laterally Inverted: The image is a mirror image of the object, meaning left and right are reversed.
- Behind the Mirror: As mentioned, the virtual image appears to be located behind the mirror, at the same distance as the object is in front of it.
Conclusion:
Thus, when you look into a plane mirror, the image appears to be behind the mirror’s surface, although no physical light rays exist in that location. The appearance of the image behind the mirror is a key characteristic of virtual images formed by plane mirrors.