themicroscope baru
TRANSCRIPT
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The Microscope
Riskiya.RValencia.G
Nimas.T
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The HistoryMany people experimented with makingmicroscopes
Was the microscope originally made byaccident? (Most people were creatingtelescopes)
The first microscope was 6 feet long!!!
The Greeks & Romans used lenses tomagnify objects over 1000 years ago.
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The History
Hans and Zacharias Janssen of Hollandin the 1590s created the firstcompound microscope
Anthony van Leeuwenhoek and RobertHooke made improvements by workingon the lenses
Anthony van Leeuwenhoek
1632-1723
Robert Hooke
1635-1703
Hooke Microscope
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The History
Zacharias Jansen1588-1631
The First Microscope
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How a Microscope Works
Convex Lenses arecurved glass used to
make microscopes(and glasses etc.)
Convex Lenses bendlight and focus it inone spot.
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How a Microscope WorksOcular Lens(Magnifies Image)
Objective Lens(Gathers Light,Magnifies
And Focuses ImageInside Body Tube)Body Tube
(Image Focuses)
Bending Light : The objective (bottom) convex lensmagnifies and focuses (bends) the image inside thebody tube and the ocular convex (top) lens of amicroscope magnifies it (again).
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The Parts of a Microscope
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Body Tube
Nose Piece
Objective
Lenses
StageClips
Diaphragm
Light Source
Ocular Lens
Arm
Stage
Coarse Adj .
Fine Adjustment
Base
Skip to Magnification Section
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Body Tube
The body tube holds the objectivelenses and the ocular lens at the proper distance
Diagram
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Nose Piece
The Nose Piece holds the objectivelenses and can be turned to increasethe magnification
Diagram
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Objective Lenses
The Objective Lenses increasemagnification (usually from 10x to 40x)
Diagram
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Stage Clips
These 2 clips hold the slide/specimen inplace on the stage.
Diagram
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Diaphragm
The Diaphragm controls the amount of light on the slide/specimen
Turn to let more light in or tomake dimmer.
Diagram
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Light Source
Projects light upwards through thediaphragm, the specimen and thelensesSome have lights, others have mirrorswhere you must move the mirror toreflect light
Diagram
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Ocular Lens/Eyepiece
Magnifies the specimen image
Diagram
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Arm
Used to support the microscope whencarried. Holds the body tube, nosepiece and objective lenses
Diagram
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Stage
Supports the slide/specimen
Diagram
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Coarse Adjustment Knob
Moves the stage up and down (quickly)for focusing your image
Diagram
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Fine Adjustment Knob
This knob moves the stage SLIGHTLYto sharpen the image
Diagram
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Base
Supports the microscope
Diagram
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Magnification
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Magnification
To determine your magnificationyou just multiply the ocular lens by theobjective lensOcular 10x Objective 40x:10 x 40 = 400
Objective Lens havetheir magnificationwritten on them.
Ocular lenses usually magnifies by 10x
So the object is 400 times larger
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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 armand the other on the base
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Carry a Microscope Correctly
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Using a Microscope
Start on the lowest magnificationDont use the coarse adjustment knob
on high magnificationyoull break theslide!!!Place slide on stage and lock clips
Adjust light source (if its a mirrordontstand in front of it!)Use fine adjustment to focus
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Referenceshttp://www.cerebromente.org.br/n17/history/neurons1_i.htmGoogle Imageshttp://science.howstuffworks.com/light-microscope1.htm