Plane Mirror
1. A plane mirror is represented like this: -
2. Laws of Reflection:
(i) The angle of incidence is equal to the angle of reflection, and
(ii) The incident ray, the normal to the mirror at the point of incidence and the reflected
ray, all lie in the same plane.
3. A plane mirror forms a laterally inverted, virtual image as far behind a mirror as the
object is in front of the mirror.
4. There are two kinds of images formed by mirrors of objects placed before them namely
‘REAL IMAGE’ and ‘VIRTUAL IMAGE’.
5. Real Image are those images, where the rays of light after reflection actually meet to form
an image. [figure]
6. Virtual Image are those images, where the rays of light appear to meet after reflection to
form an image.
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Plane Mirror
7. A laterally inverted image occurs in case of a reflected image. Its applicable for all kinds
of mirror. To get an idea what laterally inverted image, check out how the alphabets of the
English language look in a mirror:
8. Reflection is an optical phenomena where direction of rays of light are reversed when they
come in touch with the surface of any mirror. Reflection occurs at the surface of a mirror.
9. Let draw a ray diagram showing reflection by a plane mirror.
10. The image formed by a plane mirror is as much behind a plane mirror as the object is front
of the mirror. Therefore, if you are near a mirror, the image appears to be large, as the
image is, just behind the mirror. If you move away from the mirror, the image also moves
farther away. The image gets smaller.
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