Question

A 150 cm tall girl standing 1.0 m from a 75 cm, vertical plane mirror sees her entire image in the mirror. If she moves to a distance 0.5 m from the mirror, which of the following is true.

A/she wont be able to see the top of the head B/ she will only see half of herself C/She wont be able to see her feet D/She willl still see her entire self

Answer 1

An important property of plane mirror is that to view an image of oneself in a plane mirror, one will need an amount of mirror equal to one-half of one's height.
In given condition girls's height is 150cm and size of plane mirror is 75cm (which is one-half of the height of girl). So,size of plane mirror fulfills the required condition of making entire image. Also,this condition has no relation with the distance of object from mirror.
Hence, option D e.g. She willl still see her entire self will be correct.