Parts of The Microscope Quiz and Microscope Quick Rules ~ Review

Turns the microscope on and off

On/ Off switch

Allows specimen to be viewed in brighter conditions than normal

Light

Connects the ocular to the objective lens

Attached to the arm of the microscope

Viewing Tube

The bottom support of the microscope

Base

The support holding the ocular, the objective lenses, and the stage

Arm

Attached to the revolving nosepiece; magnifies an image 4x

Low Power Objective

Attached to the revolving nosepiece; magnifies an image 10x

Medium Power Objective

Attached to the revolving nosepiece; magnifies an image 43x

High Power Objective

Turns to change from one power to another

Nosepiece

supports slide

Stage

Holds a slide in place for viewing

Stage clips

Regulates the amount of light entering the microscope

Diaphragm

brings objects into rapid, but coarse focus

Coarse adjustment knob

brings objects slowly into fine focus

Fine adjustment knob

Carry the microscope with one hand under the base and one hand on the arm of the microscope. Don't forget to wrap the cord!

Carrying the Microscope

Directs light into the microscope

mirror or lamp

What are the steps used to use a microscope?

1. Turn the microscope on
2. Start with scanning obj. after inserting slide.
3. Find and focus on your specimen; use coarse adj. knob
4. Switch to low obj.
5. Focus with only fine adjustment knob
6. Switch to high if needed.
7. Focus with only fine adj. knob
8. Locate specimen; record data
9. Remove slide and dispose it
10. Switch back to scanning obj. for others to use
11. Turn off microscope and carry it back to it's assigned position.

Allows light to pass through the stage

Stage Opening

Contains a lens capable of 10x magnification

Eyepiece

A Compound Light Microscope...

1. Has more than one lens
2. Is commonly used in science classes
3. Can magnify objects up to 1000 times

Total magnification of a microscope is determined by...

multiplying the eyepiece lens magnification to the objective lens magnification.

The fine adjustment knob must be used to...

sharpen focus when using high-power magnification.

Which power can you only use the coarse adjustment knob?

You can only use the coarse adjustment know under low power. The fine adjustment knob can be used for all three powers on the microscope.