Compound Light Microscope

ocular (eyepiece) lens

magnifies the specimen, 10 times

coarse adjustment knob

this knob moves the stage up and down to focus on the object (bigger movements)

fine adjustment knob

this knob sharpens an image under medium and high power

revolving nosepiece

this is where the objective lenses are mounted

objective lenses

these are the lenses that magnify the specimen (4x, 10x, and 40x)

stage

this is where you place a slide for observation

stage clips

these are used to hold a slide in place

diaphragm

adjusts how much light is reaching the slide

light source/lamp

supplies the light that passes through the specimen

arm

used to carry the microscope

base

provides a stable platform for the microscope

Body tube

separates the ocular lens from the objective lenses at a distance calculated for proper magnification

4x

Low Power used for scanning in order to find the specimen.

10x

Medium Power has this magnification

40x

High Power has this magnification

40x Total Magnification

The total magnification using the low power objective (remember the eyepiece is included)

100x Total Magnification

The total magnification using the medium power objective (remember the eyepiece is included)

400x Total Magnification

The total magnification using High Power Objective (remember the eyepiece is included)

Coarse adjustment knob

This part of the microscope is initially used to bring the object into focus underneath the low, scanning power.

to the left

The slide will appear to move this direction if you are physically moving the slide to the right

to the right

The slide will appear to move this direction if you are physically moving the slide to the left

upside down

A letter that is right side up will appear this way.

Multiplying

Total Magnification is determined by do this with the ocular lens and the objective lens.