1. Using a Compound Microscope
Ms. Vasquez

2. Image belongs to BiologyCorner.com:

3. Objective Lens RED- Scanning Objective Lens YELLOW- Low Power Lens
Use the coarse adjustment knob while viewing under this lens ONLY
YELLOW- Low Power Lens
BLUE- High Power Lens
*If you lose your image while using the low/high power lens, go back to the scanning objective lens and start over.
Image belongs to David B. Fauser, Ph.D.

4. Calculating the Power of Magnification
Ocular lens= 10X Scanning Objective Lens= 4X Low Power Lens= 10X High Power Lens= 40X ocular lens x objective lens= total power of magnification (10X) x (4X)= 40X (10X) x (10X)= 100X (10X) x (40X)= 400X

5. WATCH BETWEEN 1:50 to 2:30 ONLY
How to Prepare a Slide
Video belongs to TCC IT Services
WATCH BETWEEN 1:50 to 2:30 ONLY
*If the video does not play, go to the next slide and then switch back. Otherwise, use the following link:

6. Lets Review! Click on the best answer:
What is the power of magnification of the high power lens?
Which piece controls the amount of light that passes through?
When is it okay to use the coarse adjustment knob?
A. When using the ocular lens 4X
Coarse adjustment knob
10X
Ocular lens
B. When using the scanning objective lens
40X
Diaphragm
C. Always

7. CORRECT!

8. TRY AGAIN!

9. Now you are ready to explore the microscopic world of science!
Enjoy!

10. Acknowledgments
The images and video used in this interactive presentation are not owned by the creator (Maria Vasquez), who gives full credit to the sources from which the contents were obtained.