Q. 104.1( 18 Votes )

The magnification produced by a plane mirror is + 1. What does this mean?

Answer :

Given,

Magnification by plane mirror= 1


We know,



Substituting value of magnification in this formula:


Height of object = Height of image


So, the given information signifies that image formed by a plane mirror is of same size as that of object.


Also,



Substituting value of magnification in this formula:


Object distance = - Image distance


Or image distance = - Object distance


So, the given information also tells that image formed by a plane mirror is at same distance behind the mirror as the object is in front of the mirror i.e. virtual and erect image.


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