1. The Microscope Micro – small Scope – to look at
On the next slide there is an image of a microscope, very similar to the scopes we use in class.
Click on the boxes to see the name and function of each part of the microscope.

2. Microscopes
Are instruments used to see objects that are too small for the naked eye. 
There are many types of microscopes. The most common (and the one we will use) is the optical microscope, which uses light to image the sample.

3. How they work
Light passes through a series of lenses, with each lens magnifying the specimen a little more.

4. Parts of a microscope Eyepiece The lens you look through that
magnifies the specimen.
Contains the lens and magnifies the image for the viewer

5. Parts of a microscope Body tube The hollow tube through which
light passes. It holds the lenses in place.
Tube extending from eyepiece to the objectives

6. Parts of a microscope Nosepiece holds the objective lenses.
the round part that
holds the objective lenses.
Rotates to change objectives.
Revolving circular structure containing the objectives

7. Parts of a microscope Low power (short) High power (long) Objectives
Magnifies the specimen a small amount.
High power (long)
Magnifies the specimen at a greater power.
Lens that receives light from object to form a magnified image that you view through the eyepiece

8. Parts of a microscope Arm
Supports the body tube. Used to carry the microscope.
Part of the microscope that is used for carrying

9. Parts of a microscope Stage
Supports the slide containing the object that you are viewing.
Surface on which the slide is placed

10. Parts of a microscope Stage clips on the stage. Holds down the slide
Used to hold the slide on the stage

11. Parts of a microscope Diaphragm
Changes the amount of light reaching the objective lenses.
Located under the Stage.
Controls the amount of light that passes up through the bottom of the stage

12. Parts of a microscope fine adjustment Coarse adjustment
Raises or lowers the stage to make big focus adjustments
fine adjustment
Raises and lowers the Body Tube to make fine focus adjustments.
Used for focusing the microscope at different objectives

13. Parts of a microscope Light source
Located beneath the Stage and diaphragm.
Sends light through the aperture (hole) in the stage.
Provides a steady stream of light that passes up through the bottom of the stage

14. Parts of a microscope Base
Bottom part of the microscope that houses the light bulb and electrical circuits.
Supports the microscope

15. Magnification
Multiply the eyepiece magnification (10X) by the objective magnification (4X, 10X, 40X)
Example: 4 x 10 = 40X total

16. Setting up the microscope
To carry the microscope, grasp the ARM with one hand. Hold the BASE with your other hand.
When you plug in the microscope, make sure that the cord is not hanging off the table.

17. How to use a microscope
Place the slide on the stage, centered over the aperture.
Use stage clips to secure slide
Adjust nosepiece to lowest setting
(Lowest = shortest objective)

18. How to coarse focus
Use coarse focus knob to raise the stage until the objective nearly touches the slide.
While looking through the eyepiece, adjust the coarse adjustment knob until the specimen is clear.

19. How to fine focus
Looking at the side of the microscope, turn the nosepiece until the high power objective clicks into place.
Only adjust focus using the fine adjustment knob.