1. The problem statement, all variables and given/known data A microscope with a tube length of 160 mm achieves a total magnification of 800X with a 40X objective and a 20X eyepiece. The microscope is focused for viewing with a relaxed eye. How far is the sample from the objective lens? 2. Relevant equations M=(Meyepiece)(Mobjective) Meyepiece=25/Feyepiece Mobjective = -L/fobjective 3. The attempt at a solution so I found the fobjective to be 0.4cm and the feyepiece to be 1.25 I'm just not sure what to do next. Which objective do I use to find the distance of the sample? or do you combine them somehow?