Microscopes Section 3-1.

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Presentation transcript:

Microscopes Section 3-1

History of the Microscope 1590 –first compound microscope

History of the Microscope 1655 – Robert Hooke used a compound microscope to observe pores in cork He called them “cells”

History of the Microscope Antoine van Leeuwenhoek 1st to see single-celled organisms in pond water

Microscope Vocabulary Magnification: increase of an object’s apparent size Resolution: power to show details clearly Both are needed to see a clear image

1. Compound Light Microscope 1st type of microscope, most widely used Types of Microscopes 1. Compound Light Microscope 1st type of microscope, most widely used light passes through 2 lenses Can magnify up to 2000x

Ocular lens Objective lenses

Types of Microscopes 2. Electron Microscope Used to observe VERY small objects: viruses, DNA, parts of cells Uses beams of electrons rather than light Much more powerful

Transmission Electron Microscope (TEM) Can magnify up to 250,000x Types of Microscopes Transmission Electron Microscope (TEM) Can magnify up to 250,000x

Scanning Electron Microscope (SEM) Can magnify up to 100,000x Types of Microscopes Scanning Electron Microscope (SEM) Can magnify up to 100,000x

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