Question

Question #586de

Answer 1

The distance between two parallel mirrors is `l`

The point `O` is placed at a distance `l/3` from a mirro.

So the distance of point `O` from other mirror will be `l=l/3=(2l)/3`

Hence the distance between any two images in the second mirror is `>= (l+l/3-(2l)/3)=(2l)/3`

Hence the distance between any two images in the 1st mirror is `>=(l+(2l)/3-l/3)=(4l)/3`

The distance between the first mimage of first mirror and the first image of second mirror is

`=l/3+l+(2l)/3=2l`

So the distance between any two images can not be `<(2l)/3`