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The perpendicular to the mirror at the point of incidence is called ______.
State which surface of a plane mirror reflects most of the light incident on it: the front smooth surface or the back silvered surface.
The diagram in Figure shows a point object P in front of a plane mirror MM1.

(a) Complete the diagram by taking two rays from the point P to show the formation of its image.
(b) In the diagram, mark the position of eye to see the image.
(c) Is the image formed real or virtual? Explain why?
How many images will be formed when an object is placed between two parallel plane mirrors with their reflecting surfaces facing each other? Why do more distant images appear fainter?
Locate the image termed when the object is placed between two planes as shown in the following figure.

A light ray enters from medium A to medium B as shown in Figure 10.2. The refractive index of medium B relative to A will be

We can see objects because of ______.
