Question

How do we know that the magnification of plane mirror is +1 ? Prove it .

Answer 1

Answer:

We know that the size of image and object is same in plane mirror

therefore h=h'

m=h'/h

put h'=h

m=h/h

m=1

hence proved

pls mark brainliest

Answer 2

Magnification of a Plane Mirror is + 1

• Image produced on a plane mirror is virtual and erect i.e.,the magnification would be always positive

• Image in a plane mirror is as the same size as the object,the magnification would be 1

Let u be the size of object and v be the size of image

$\sf{m = \frac{v}{u} \ \ \ \ \ [\because "m" is +ve]} \\ \\ \sf{\longrightarrow \ m = \frac{u}{u}} \\ \\ \sf{\longrightarrow \ m = 1}$

From this,we conclude that the magnification of plane mirror is + 1