1. Do Now:
Plant Animal 1. 2. 3. 4. 5.

2. DO NOW: What does a microscope do?
The Microscope
DO NOW:
What does a microscope do?

3. Magnify! Enlarge the image
Ocular lens x objective lens = total magnification
Objective
lenses
Ocular lens

4. What is the Total Magnification?
Ocular lens = 10x
Objective lens = 40x
(x means how many times the object is multiplied or magnified)
400x !

5. Measure
Determine the size of a specimen in millimeters (mm) or micrometers (um)
1/1,000,000 of a meter

6. Resolution Sharpness of the image
The ability to show two points that are close together as two separate images.

7. Types of Microscope 1. Compound light microscope
Compound because it uses two lenses.
Uses a light source
Convenient and easy to use
Inexpensive
Can magnify up to 500x
Have to stain specimens which kills it

8. Dissecting Microscope
Has a stage to put large specimens to work on or “dissect”
Uses two eyepieces
Has low magnification
Gives a three dimensional view
Lightweight and easy to use

9. 3. Electron Microscope Uses electron beam and electromagnetic lenses.
Can magnify 250,000x
Very large and expensive
Kills the specimen.

10. Image Gallery

11. Eyepiece (10X) Body tube arm aperture Stage clips stage
nosepiece
arm
Medium power
Objective lens
aperture
high power
Objective lens
Stage clips
Course adjustment
stage
Fine adjustment
Light
diaphragm
Base

12. Steps to follow when using the microscopes
Carry the microscope by the arm
Begin with low (scanning lense) with the stage down.
Turn on the light
Focus with coarse adjustment knob
Never use the coarse adjustment with high power!
Be patient! 