IFFAT FATIMA. UOG. ELECTRON MICROSCOPE. Contents. History LM Vs EM Electron microscope Principle Types of EM Application & importance. History of Microscope. 1590-tube microscope by dutch glass maker. 1665-Robert hooke’s microscope. Continued…………………………….
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
1590-tube microscope by dutch glass maker
1665-Robert hooke’s microscope
1674-Antonee van leeuwenhooke
TEM co-invented by Ernst Ruska (1931)
Objects seen: orgenelles‚ proteins‚ viruses‚ small molecules etc.
Higher resolving power
Focus: vaccum & magnetic lense
Resolution: 0.2μm to 200nm
Objects seen: frog's egg cells‚ cell wall‚ cilia‚ flagella‚ nucleus & other organelles etc.
Lower resolving power
Focus: condenser lense
Why electron beam?