1. Microscopes

2. A microscope is… an instrument that produce images or pictures of small objects.

3. Brief History of Microscopes

4. ~1590 Hans and Zacharias Janssen Made the first compound microscopes tube with lenses at each end magnification ranged from 3X to 9X

5. Robert Hooke, 1635-1703 Hooke's microscope magnified objects up to 30X Looked at slices of a cork, saw chambers and called them "cells“ Wrote a book that helped lead to the discovery of bacteria

6. Anton van Leeuwenhoek, 1632-1723 made simple (one lens), small microscopes that were the best ones for that time period (up to 90x) first person to describe bacteria Discovered protozoans, Helped to prove the theory of blood circulation.

10. 2011

11. 3 Main Types of Microscopes

12. Compound light microscope Light passes through the specimen and produces a flat image

13. Images taken from a Compound Light Microscope

14. Transmission Electron Microscope (TEM) Electrons pass through the specimen and produce a flat image

15. Images taken from a TEM

16. Scanning Electron Microscope (SEM) Electrons bounce off the surface of the specimen and produce a three-dimensional image

17. Images taken from a SEM

18. Review

19. Microscopes are instruments designed to produce images or pictures of small objects. Zacharias Janssen was the first to build a compound microscope Robert Hooke built a better microscope and with it discovered many things, including cells Anton van Leeuwenhoek designed very small microscopes, but with them was able to discover bacteria, protozoans and he helped to prove the theory of blood circulation

20. The three types of microscopes are: Compound light microscope Transmission Electron Microscope Scanning Electron Microscope