the microscope
DESCRIPTION
The Microscope. Learning Objectives. By the end of this topic, you will be able to: Name the parts of the microscope and their functions. Use the microscope to observe biological specimens Know the difference between the light microscope and the electron microscope. Compound Microscopes. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/1.jpg)
The Microscope
![Page 2: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/2.jpg)
Learning ObjectivesBy the end of this topic, you will be
able to:
1. Name the parts of the microscope and their functions.
2. Use the microscope to observe biological specimens
3. Know the difference between the light microscope and the electron microscope
![Page 3: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/3.jpg)
Compound Microscopes
a. The Eyepiece Lens is the lens that you look through.b. The objective lens is the lens that is immediately above the specimen.
The microscopes used in our lab are called compound microscopes because they have two magnifying lens
![Page 4: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/4.jpg)
The Objective LensesThere are three objective lenses:
- the scanning lens with the 4X label
- the low power lens with the 10X label
- the high power lens with the 40X label
![Page 5: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/5.jpg)
Parts of the Microscope
![Page 6: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/6.jpg)
Parts of the MicroscopePart Function
Lenses MagnificationStage To place the slide onClips Hold the slide in placeDiaphragm To control the amount of
lightCoarse Focus Knob
To focus the image
Fine Focus Knob To precisely focus the imageLight To supply light to the object
![Page 7: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/7.jpg)
Learning CheckLabel the parts of the
Microscope
![Page 8: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/8.jpg)
MagnificationMagnification = the magnifying power of the eyepiece lens
x the magnifying power of the objective lens.
Example:
Eyepiece lens = 10XObjective lens = 4X
Total magnification = 10 x 4= 40X
![Page 9: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/9.jpg)
Focussing The ImageThe course focus knob allows for dramatic or large movement of the objective lens.
The fine focus knob allows for very slight movement of the objective lens.
![Page 10: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/10.jpg)
The Stage and the Diaphragm
The stage has two metal clips to hold the microscope slide in place.
The diaphragm allows light to be focused onto the specimen through a hole in the stage.
![Page 11: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/11.jpg)
ELECTRON MICROSCOPE
![Page 12: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/12.jpg)
Electron Microscope Uses Electrons instead of light
Electrons have much lower wavelength than light
Resolution is much better
Magnification is much greater
![Page 13: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/13.jpg)
Images from Electron Microscope
Bacteria
Cytplasm
Platelet
![Page 14: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/14.jpg)
Learning CheckWhat is the function of each of these parts of the Microscope?
Eyepiece Lens Objective LensStage ClipsDiaphragm Coarse Focus KnobFine focus Knob Light
![Page 15: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/15.jpg)
What have you learned?Can you?
1. Name the parts of the microscope and their functions.
2. Use the microscope to observe biological specimens
3. Outline the differences between the light microscope and the electron microscope
![Page 16: The Microscope](https://reader036.vdocuments.mx/reader036/viewer/2022062811/568160cc550346895dd0011a/html5/thumbnails/16.jpg)
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