42 plane mirror diagram
A plane mirror always form virtual images of real objects as here for any real object which is kept to the left of mirror image is always A plane mirror does not converge light. See the diagram below Locating an Image in a Plane Mirror. The law of reflection tells us that the angle of incidence is the same as the angle of reflection. Applying this to triangles PAB and QAB in and using basic geometry shows that they are congruent triangles. This means that the distance PB from the object to the mirror is the same as the distance BQ from the mirror to the image. Plane Mirrors III. A ray of light is approaching a set of three mirrors as shown in the diagram. The light ray is approaching the first mirror at an angle of 45-degrees with the mirror surface. Plane mirror diagram