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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