AS Biology Microscopes and Magnification

What two lenses do Light Microscopes have?
Eyepiece lens and Objective lens
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What do both lenses do to the sample?
Magnify it
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Which lens is first to maginify the specimen?
Objective lens
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What does the eyepiece lens do?
Magnifys it to make it clearer
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Define Magnification
How many times larger the image is that the actual size of the object being viewed
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Define Resolution
The ability to distinguish two objects that are close togther as seperate
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How many Mirometers are in 100 nm
1
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How many Micrometers in 1 mm
1000
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How many Millimeters in 1 m
1000
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How do Transmission Electron Microscopes work?
A beam of electrons are transmitted through the specimen and focused to produce an image
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How do Scanning Electron Microscopes work?
A beam of electrons is sent across the surface of the specimen and the reflected electrons are collected back
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What is maximum magnification of a Light Microscope?
x2000
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What is the resolving power of a Light Microscope?
200 nm
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Which microscope is a vacuum required- LM or EM?
Electron microscope
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What is the magnification of a Electron Microscope?
Over x500,000
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What is the resolving power of a Transmission Electron Microscope?
0.5 nm
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What is the resolving power of a Scanning Electron Microscope?
3-10 nm
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Other cards in this set

Card 2

Front

What do both lenses do to the sample?

Back

Magnify it

Card 3

Front

Which lens is first to maginify the specimen?

Back

Preview of the front of card 3

Card 4

Front

What does the eyepiece lens do?

Back

Preview of the front of card 4

Card 5

Front

Define Magnification

Back

Preview of the front of card 5
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