Microscopes and magnification (AQA GCSE Biology): Flashcards
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13 cards from this deck
When were light microscopes invented?
When were light microscopes invented?
Around 350 years ago
Maximum magnification of light microscopes
Maximum magnification of light microscopes
x2000 (2000 times)
What electron microscopes use instead of light
What electron microscopes use instead of light
Electrons
Maximum magnification of electron microscopes
Maximum magnification of electron microscopes
x2 million (2 million times)
Definition of resolving power
Definition of resolving power
How well a microscope can distinguish between two objects that are very close together
Resolution of light microscopes
Resolution of light microscopes
200 nm
Resolution of transmission electron microscopes
Resolution of transmission electron microscopes
0.1 nm
Resolution of scanning electron microscopes
Resolution of scanning electron microscopes
10 nm
Formula for magnification
Formula for magnification
Formula for real object size
Formula for real object size
Conversion: 1 mm = ? μm
Conversion: 1 mm = ? μm
1000 μm
What do scale bars show?
What do scale bars show?
Real size that distances in the image represent
Unit used to measure resolution
Unit used to measure resolution
Nanometers (nm)