1. Microscopes

2. Microscope History Robert Hooke English scientist 1655
Used crude microscope to observe a thin slice of cork
Saw boxes that reminded him of small rooms where monks lived. He decided to call them cells as that’s what they were called.
He later observed cells in the stems and roots of plants

3. Anton von Leeuwenhoek 1665 Dutch scientist
Used a microscope to view pond water
Discovered many living creatures he called “animalcules” (Little animals)

4. A microscope is a tool used to look at things that are too small to see with the unaided eye.
Micro means small.
Scope means to look at.
Microscopes allow us to see cells, which are the basic unit of life.

5. Types of Microscopes Simple Light 1 lens Energy source = light
Low magnification

6. Types of Microscopes Compound light 2 + lenses Energy source = light
Eyepiece lens = 10
Objective = 4
Total Magnification = 40
(Eyepiece lens X Objective)

7. Types of Microscopes Electron Microscope Uses a beam of electrons
Magnify up to 500,000 times
Types of Electron Microscopes
SEM = Scanning electron microscope
Surface
TEM = Transmission electron microscope
Inside

8. Parts of a Microscope

9. Important Terms Magnification Field of View
Describes how much larger an image appears
Calculated by objective lens X ocular lens
Field of View
What can be seen when looking in a microscope
As magnification increases, field of view decreases

10. How to Properly Use a Microscope
Place the microscope on a flat stable surface.
Plug the microscope in so that the cord does not stretch across the path that someone would walk through.
Turn the microscope on.
Make sure the objective lens is on low power.
Place your slide on the stage and secure with the stage clips.

11. Proper Use Continued
Focus on low power using the coarse adjustment knob.
Change objective to high power by carefully rotating the nosepiece.
Focus on high power using the fine adjustment ONLY!!!

12. Proper Storage Objective lens switched to low power Stage is clear
Cord is wrapped around the base
Covered

13. Proper Way to Carry a Microscope
One hand on the arm and the other hand on the base.