Oh wow!
Okay so if the diameter of the mirror is 200mm (a 100mm radius)
and the sagitta is 10mm and the glass is parabolic.
Oh I'm pretty poor at brackets
Any chance of a more layman version?
Hi,
We're offered shaving mirrors by suppliers and sometimes their claims to the magnification are doubtful.
I don't wish to upset any customers by giving incorrect information.
So is there a practical way in which I can test the magnification myself? i.e. measuring the distance of the...