The Electron Microscope (AQA A-Level Biology): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Why do electron microscopes have better resolution than light microscopes?
Why do electron microscopes have better resolution than light microscopes?
Shorter wavelength of electron beam
Resolution improvement of electron microscopes over light microscopes
Resolution improvement of electron microscopes over light microscopes
2000 times better
Why is a vacuum needed in electron microscopes?
Why is a vacuum needed in electron microscopes?
Electrons interact with air molecules
TEM stands for
TEM stands for
Transmission electron microscope
SEM stands for
SEM stands for
Scanning electron microscope
TEM resolving power
TEM resolving power
SEM resolving power
SEM resolving power
What are artefacts in electron microscopy?
What are artefacts in electron microscopy?
Artificial features from preparation, not in natural specimen
Image type: TEM vs SEM
Image type: TEM vs SEM
TEM: 2-D; SEM: 3-D surface
Why can't living specimens be observed in electron microscopes?
Why can't living specimens be observed in electron microscopes?
Vacuum requirement