Using a Microscope 1 Ocular lens This is

Using a Microscope

1. Ocular lens • This is the part you look through • It has a magnification of 10 x

2. Body Tube • This holds the ocular lenses

3. Objectives • These are the high powered lenses • The power of each objective is written on the side • To get the overall magnification, you have to ALSO multiply by 10 (because the ocular lens also magnifies)

4. Arm • Holds objectives and ocular lenses

5. Stage • The platform where you place your slides

6. Stage Clips • Put your slide in them to hold it in place

7. Coarse Adjustment • This will raise and lower the stage with your sample on it • It moves the stage more/faster than the fine adjustment • NEVER use this on high power!!!!

8. Fine Adjustment • Raises and lowers the stage only a little bit at a time • Use this while on high power

9. Diaphragm • Changes the amount of light that reaches the sample

10. Light • Obviously, this is where the light comes from…

11. Base • Bottom of the microscope, used for support

How to use the microscope 1. Make the slide: a) put the sample on the slide b) put 1 -2 small drops of water on the slide c) put the cover slip on at an angle (to avoid air bubbles) 2. 3. 4. 5. Put the slide under the stage clips Start on the LOWEST (smallest) objective Center the object in the view and focus it Move to a higher objective

How to draw what you see 1. Draw a circle about 2 inches in diameter 2. Label the overall magnification 3. Label the identity of the sample 4. Draw the sample exactly the way it appears through the microscope (your drawing should fill the entire circle)

If You Are Having Trouble Seeing the Object… • Go back to the lowest power you could see it on… – CENTER the object so it is in the middle of the viewing circle – FOCUS the object so it is CLEAR *If you can’t see it on low power, you will NOT see it better on a higher power*