Electron microscope Flashcards
What do electron microscopes use for a light source?
They use beams of tiny particles of light called electrons.
What is the maximum magnification for a electron microscope?
A million times.
What are the two different types of electron microscopes?
-Transmission electron microscopes
-Scanning electron microscopes
Is preparation needed for the specimen with a T.E.M?
Yes, the specimen must be very thinly sliced.
How does a T.E.M work?
Electrons pass through the specimen and through the objective lens.
What can you see through a T.E.M when looking at the specimen?
You are able to see the inner structures such as cells.
Does the image of the specimen contain colour with a T.E.M?
No, the image is black and white but can be coloured.
Why do scientists add colour to T.E.M images?
To increase contrast.
Is preparation needed for the specimen with a S.E.M?
No, the specimen does not need to be sliced.
How does a S.E.M work?
Electrons reflect of the specimen and go through the objective lens.
What can you see through a S.E.M when looking at the specimen?
The specimen will be greatly magnified.
Does the image of the specimen contain colour with a S.E.M?
No, the image is black and white.
How can the image of the specimen contain colour with a S.E.M?
The image can be given false colour using computers.
