Figure. Shows a point object A and a plane mirror MN. Find the position of the image of object A, in mirror MN, by drawing ray diagram. Indicate the region in which the observer's eye must be present in order to view the image. (This region is called field of view.)

Explanation

See figure consider any two rays emanting from the object `N_(1)` and `N_(2)` are normals:
`i_(1) = r_(1)` and `i_(2) = r_(2)`

The meeting point of reflected rays `R_(1)` and `R_(2)` is image `A'` . Though only two rays are considired it must be understood that all rays from `A` reflect from mirror such that their meeting point is `A`. TO obtain the region in wghich reflected rays are present join `A` with the ends of mirro ran dexterned. The following figures shows this regionas shaded. In figure, there are no reflected rays beyond the rays `1` and `2` therefore the observers `P` and `Q` cannot see the image becuase they do not receive any reflect ray.