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Microscopes A. Magnification – to increase the size of an image of an object

The Cell. Honors Biology Chapter 4. Microscopes A. Magnification – to increase the size of an image of an object B. Resolution – how clear the image appears…the more magnified, the more blurry the image (light bends) C. Types of Microscopes

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Microscopes A. Magnification – to increase the size of an image of an object

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  1. The Cell Honors Biology Chapter 4 • Microscopes • A. Magnification – to increase the size of an image of an object • B. Resolution – how clear the image appears…the more magnified, the more blurry the image (light bends) • C. Types of Microscopes • 1. Light microscope – light shines through the object • a. simple – one lens • b. compound – two lenses (what we have) • 2. Electron microscope – bounces a beam of electrons off of an object coated in gold. Only see surfaces of objects

  2. Pictures of Electron Microscope at Miami

  3. Cat Flea

  4. D. Parts and Function of a compound light microscope 1. Base – supports microscope 2. Light – shines through the object 3. Stage – where the slide sits when viewing 4. Eyepiece lens – lens closest to eye (mag.10X) 5. Arm – connects the eyepiece to the base 6. Objective lens – lens closest to object a. 4X b. 10X c. 40X d. 100X 7. Diaphragm – adjusts the amount of light shining through the object (disk vs. iris) 8. Nosepiece – rotates the objective lenses 9. Coarse adjustment – brings object into the field of view 10. Fine adjustment – focuses object, increases resolution

  5. Eyepiece Arm Coarse Adjustment Fine Adjustment Nosepiece Objective lens Stage Diaphragm Light Base

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