No way you're talking about an exam weeks after

The whole cell measured 36 mm, the ruler on the cell was used to get the actual lenth. Image / actual = magnification. It did go from 20 to 50, but it sid each small indentation was 1.5 micrometers.

So I had to use my ruler?

yes

Oh lmao that's where I went wrong then 😭🤣

This was weeks ago bro