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Microscopes
Types of Microscopes
• Simple • Compound • Stereoscopic • Electron
Simple Microscope
• Similar to a magnifying glass • Only has one lens
Compound Microscope
• Lets light pass through an object and then through two or more lenses
Stereoscopic Microscope
• Gives a three dimensional view of an object
Electron Microscope
• Uses a magnetic field to bend beams of electrons (instead of using lenses to bend beams of light)
Electron microscope image of a fly foot
Microscope Parts
OPEN YOUR WORKBOOK – label the microscope
Microscope Parts
Eyepiece Body Tube
Revolving Nosepiece Arm Objective Lens
Stage Stage Clips
Coarse Focus Fine Focus
Base
Diaphragm Light
Eyepiece and Objective Lenses
• Eyepiece lens usually has a power of 10x • Objective lens: low power = 4x
medium power = 10x high power = 40x
Total Magnification
Eyepiece Lens x Objective Lens = Total Magnification
Microscope Care
• Always carry with two hands • Only use lens paper for cleaning • Do not force knobs • Keep objects clear of desk and cords
Using the Microscope
• Place the Slide on the Microscope • Use Stage Clips • Click Nosepiece to the lowest (shortest) setting • Look into the Eyepiece • Use the Coarse Focus
Using High Power
• Follow steps to focus using low power • Click the nosepiece to the longest objective • Do NOT use the Coarse Focusing Knob • Use the Fine Focus Knob to bring the slide to
focus
Plant Cells
Human Cheek Cells
Human Cheek Cells
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