Uploaded July 2023 | Updated September 2026, 5 hours ago

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You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology

In this video, we look at electron microscopy. First we explore why electron microscopes have a higher resolution than light microscopes. We then explore how electron microscopes work before looking at their advantages and disadvantages. Finally, we compare the transmission electron microscope with the scanning electron microscope.

Image credits:

Electron Microscope
commons.wikimedia.org/wiki/File:Electron_Microscope.jpg
David J Morgan from Cambridge, UK, CC BY-SA 2.0 creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Pancreatic Acinar Cell
commons.wikimedia.org/wiki/File:Pancreatic_acinar_cells_-_TEM.jpg
Louisa Howard, Public domain, via Wikimedia Commons

Bronchiolar epithelium
commons.wikimedia.org/wiki/File:Bronchiolar_epithelium_2_-_SEM.jpg
Louisa Howard, Charles Daghlian, Public domain, via Wikimedia Commons

Light microscope
commons.wikimedia.org/wiki/File:Optical_microscope_nikon_alphaphot.jpg
GcG(jawp), Public domain, via Wikimedia Commons

Spirogyra
commons.wikimedia.org/wiki/File:Spirogyra_Under_Light_Microscope_40_X.jpg
Iceclanl, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons