OCR AS Biology - F211 - Microscopes and Magnification

A test on pretty much everything you need to know about magnification and microscopes for OCR AS Biology. 

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What is the primary advantage of the TEM?
It can have a magnification of x500,000
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Why does a light microscope become useless if you want to view anything with a magnification above x1500?
The resolution of it is too low
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What resolution can be achieved by a light microscope?
200nm
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What resolution can be achieved by a TEM and SEM?
0.1nm
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Why do electron microscopes have a higher resolution than light microscopes
A beam of electrons has a much shorter wavelength than a beam of light
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What is the formula for the actual size of a specimen under a microscope?
Image size/Magnification
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Why do you section a specimen before viewing it under a light microscope?
It stops the material distorting when cutting it into thin sections
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What is the primary advantage of the SEM?
It produces 3D Images
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The resolution of the human eye is...
100 micrometers
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In an SEM...
The electrons are bounced of the sample, producing an image
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In a TEM...
The electrons are directed through the sample, with electrons passes less easily through certain parts, producing an image
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What does TEM stand for?
Transmission electron microscope
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What does SEM stand for?
Scanning electron microscope
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Other cards in this set

Card 2

Front

Why does a light microscope become useless if you want to view anything with a magnification above x1500?

Back

The resolution of it is too low

Card 3

Front

What resolution can be achieved by a light microscope?

Back

Preview of the front of card 3

Card 4

Front

What resolution can be achieved by a TEM and SEM?

Back

Preview of the front of card 4

Card 5

Front

Why do electron microscopes have a higher resolution than light microscopes

Back

Preview of the front of card 5
View more cards

Comments

Jess

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this really helped thank you (:

Ebun Sodipo

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this is really helpful, i learnt and remembered at the same time!

Rebecca Kidd

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I really struggled with this topic so it was helpful to test what I knew, thank you!

sonia ike

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it really helped. ;)

Swallowtail

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A  well liked  quiz covering aspects of microscopy in the form of straightforward, easy to understand questions Use for exam preparation for any specification's cells and microscopy unit. 

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