- Created by: teegs.**
- Created on: 11-04-18 10:21
1. How so SEM's work?
- They scan a beam of electrons across the specimen. This knocks off electrons from the specimen, which are gathered in a cathode ray tube to form an image.
- They screen a beam of electrons across a specimen. This knocks off the electrons from the specimen, which are gathered in a cathode ray tube to form an image.
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Other questions in this quiz
2. What organelles CANNOT be viewed by an Optical microscope?
- smaller organelles- ribosomes, endoplasmic reticulum, lysosomes.
- nucleus, mitochondria.
3. Why aren't TEM's good at viewing living organisms?
- Because you have to view the specimen in a vacuum.
- Because the living organism wont stay still.
- Because the living organism wont fit under a microscope slide.
4. What are the two types of electron microscopes called?
- Transmission electron microscopes and Scanning electron microscope.
- Transmission electron microscope and Screening electron microscope.
- Transfer electron microscope and Scanning electron microscope.
5. When using a TEM, some parts of the image appear darker. Why?
- The darker parts appear darker because they're denser, so they absorb more electrons.
- The darker parts appear darker because they cant be made out quite as well.