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The MicroscopeMr. Ryan6th Grade
The HistoryMany people experimented with making microscopes
Was the microscope originally made by accident? (Most people were creating telescopes)
The first microscope was 6 feet long!!!
The Greeks & Romans used lenses to magnify objects over 1000 years ago.
The HistoryHans and Zacharias Janssen of Holland in the 1590s created the first compound microscopeAnthony van Leeuwenhoek and Robert Hooke made improvements by working on the lenses
Anthony van Leeuwenhoek1632-1723Robert Hooke 1635-1703 Hooke Microscope
The HistoryZacharias Jansen1588-1631 The First Microscope
How a Microscope WorksConvex Lenses arecurved glass used to make microscopes(and glasses etc.)Convex Lenses bendlight and focus it inone spot.
How a Microscope WorksOcular Lens(Magnifies Image)Objective Lens(Gathers Light, Magnifies And Focuses Image Inside Body Tube)Body Tube(Image Focuses)Bending Light: The objective (bottom) convex lens magnifies and focuses (bends) the image inside the body tube and the ocular convex (top) lens of a microscope magnifies it (again).
The Parts of a Microscope
Body TubeNose PieceObjectiveLensesStage ClipsDiaphragmLight SourceOcular LensArmStageCoarse Adj.Fine AdjustmentBaseSkip to Magnification Section
Body TubeThe body tube holds the objective lenses and the ocular lens at the proper distanceDiagram
Nose PieceThe Nose Piece holds the objective lenses and can be turned to increase the magnificationDiagram
Objective LensesThe Objective Lenses increase magnification (usually from 10x to 40x)Diagram
Stage ClipsThese 2 clips hold the slide/specimen in place on the stage.Diagram
DiaphragmThe Diaphragm controls the amount of light on the slide/specimenTurn to let more light in or tomake dimmer.Diagram
Light SourceProjects light upwards through the diaphragm, the specimen and the lensesSome have lights, others have mirrors where you must move the mirror to reflect lightDiagram
Ocular Lens/EyepieceMagnifies the specimen imageDiagram
ArmUsed to support the microscope when carried. Holds the body tube, nose piece and objective lensesDiagram
StageSupports the slide/specimen Diagram
Coarse Adjustment KnobMoves the stage up and down (quickly) for focusing your imageDiagram
Fine Adjustment KnobThis knob moves the stage SLIGHTLY to sharpen the imageDiagram
BaseSupports the microscopeDiagram
Magnification
MagnificationTo determine your magnificationyou just multiply the ocular lens by the objective lensOcular 10x Objective 40x:10 x 40 = 400Objective Lens have their magnificationwritten on them.Ocular lenses usually magnifies by 10xSo the object is 400 times larger
Caring for a MicroscopeClean only with a soft cloth/tissue
Make sure its on a flat surface
Dont bang it
Carry it with 2 HANDSone on the arm and the other on the base
Carry a Microscope Correctly
Using a MicroscopeStart on the lowest magnificationDont use the coarse adjustment knob on high magnificationyoull break the slide!!!Place slide on stage and lock clipsAdjust light source (if its a mirrordont stand in front of it!)Use fine adjustment to focus
Referenceshttp://www.cerebromente.org.br/n17/history/neurons1_i.htmGoogle Imageshttp://science.howstuffworks.com/light-microscope1.htm
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