Microscopy (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
14 cards from this deck
Who first observed cells in 1665?
Who first observed cells in 1665?
Robert Hooke
Maximum magnification of a light microscope?
Maximum magnification of a light microscope?
×2000
Resolving power of a light microscope?
Resolving power of a light microscope?
200nm
What can light microscopes view?
What can light microscopes view?
Tissues, cells, large sub-cellular structures
When were electron microscopes developed?
When were electron microscopes developed?
1930s
What do electron microscopes use instead of light?
What do electron microscopes use instead of light?
Electrons
Sub-cellular structures viewed with electron microscope
Sub-cellular structures viewed with electron microscope
Mitochondria, ribosomes, chloroplasts, plasmids
What type of images does SEM create?
What type of images does SEM create?
3D images
What type of images does TEM create?
What type of images does TEM create?
2D images
Maximum magnification of an electron microscope?
Maximum magnification of an electron microscope?
×2,000,000
Resolving power of SEM?
Resolving power of SEM?
10nm
Resolving power of TEM?
Resolving power of TEM?
0.2nm
How to calculate light microscope magnification?
How to calculate light microscope magnification?
Eyepiece magnification × objective magnification
How to calculate size of object from image?
How to calculate size of object from image?
Size of image / Magnification