B1.1.4 Flashcards

1
Q

What is electron microscopy?

A

Electron microscopy use electrons instead of light to produce an image.

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2
Q

Transmission electron microscopes

A

Pass a beam of electrons through a very thin slice of a sample. The beam is focused to make an image.

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3
Q

Scanning electron microscopes

A

A beam of electrons passed across the surface. The reflected electrons are collected producing an image.

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4
Q

Benefits of light microscopy

A

Cheap to buy and operate
Small an portable
Simple to prepare a sample
Natural colour of sample is seen unless staining is used
Specimens can be living or dead

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5
Q

Benefits of electron microscopy

A

High resolution

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