Table 1 compares some of the features of optical and electron microscopes.
Table 1
Optical microscope |
Electron microscope |
|
Image is formed using... |
Light |
A |
Resolution |
Low |
B |
Maximum useful magnification |
C |
x 1,500,000 |
Can be used to observe... |
Cells down to the level of mitochondria and chloroplasts. |
D |
Use your knowledge of microscopes to fill the gaps labelled A-D in Table 1.
Describe how a transmission electron microscope uses electrons to generate an image.
Give one advantage and one disadvantage of using a transmission electron microscope.
Figure 1 below shows an image of algae taken using an electron microscope.
Figure 1
Image courtesy of SecretDisc.. Licensed under Creative Commons Attribution-Share Alike 3.0 Unported License. Reused and distributed under conditions found at: https://creativecommons.org/licenses/by-sa/3.0/deed.en
State whether the image in Figure 1 was taken using a transmission electron microscope or a scanning electron microscope.
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