- #1

surfahgirl

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## Homework Statement

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?

## Homework Equations

M=(Meyepiece)(Mobjective)

Meyepiece=25/Feyepiece

Mobjective = -L/fobjective

## 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?