U2) Electron Microscopes 0.0 / 5 ? BiologyCellular processesA2/A-levelAQA Created by: lieselb12Created on: 05-05-20 12:05 What are properties? Electrons used to form images, with very high mag + res to look at detailed structures, electrons have short wavelength 1 of 11 What is the max resolution? 0.0002 um 2 of 11 What is the max magnification? 1,500,000 x 3 of 11 What does the Transmission electron microscope do? Electrons pass through specimen, denser cell areas absorbs more e so appear darker, it visulises internal structures 4 of 11 Transmission electron microscope specimen must be? thin + dead 5 of 11 TEM images are..? images= 2D and black+white, 6 of 11 What's its magnification + resolution compared to Scanning Ems? TEM= higher mag + res 7 of 11 Electron Microscopes properties? Expensive + complicated to use so requires specalist lab training 8 of 11 What does the Scanning electron microscope do? Electrons pass across surface of specimen + only visualise specimen surface 9 of 11 Scanning electron microscope specimen must be? Thick + dead 10 of 11 SEM images are..? 3D + black + white 11 of 11
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