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6. Which of these is not a limitation of electron microscopes?
- Electron microscopes are expensive
- They require a high degree of skill and training to use
- Electron microscopes can be unreliable
- Electron beams are deflected by molecules in the air, so samples have to be placed in a vacuum
7. Which is smaller, a micrometer or nanometer?
8. What is the formula for the actual size of a specimen under a microscope?
- Image size/Magnification
- Image Size x Magnification
- Magnification/Image size
9. Why do you section a specimen before viewing it under a light microscope?
- It allows you to view the specimen outside of a vacuum
- It stops the material distorting when cutting it into thin sections
- It allows you to distinguish certain features
10. What is the primary advantage of the SEM?
- It produces 3D Images
- It can have a magnification of x500,000
- It gives an image with colour
11. Lead salts are used to scatter electrons when using a TEM or SEM, it creates contrast like a stain does with a light microscope
12. The resolution of the human eye is...
- 100 micrometers
- 0.1 micrometers
- 10 micrometers
- 1000 micrometers
13. In an SEM...
- The electrons are bounced of the sample, producing an image
- The electrons are directed through the sample, with electrons passes less easily through certain parts, producing an image
14. In a TEM...
- The electrons are directed through the sample, with electrons passes less easily through certain parts, producing an image
- The electrons are bounced of the sample, producing an image
15. In which order of lenses does light pass through a microscope?
- Condenser, Objective, Eyepiece
- Objective, Condenser, Eyepiece
- Eyepiece, Objective, Condenser
- Eyepiece, Condenser, Objective
16. What does TEM stand for?
- Transmission electron micrograph
- Transposal electron microscope
- Transposal electron micrograph
- Transmission electron microscope
- Televised electron microscope
17. What does SEM stand for?
- Scanning electron microscope
- Surveying electron microscope
- Scanning electron micrograph
- Sweeping electron micrograph