

McqMate
Q. |
The secondary electrons radiated back in scanning microscope is collected by? |
A. | specimen |
B. | anode |
C. | vacuum chamber |
D. | cathode |
Answer» B. anode | |
Explanation: in scanning electron microscope (sem), the surface of the specimen is irradiated with a very narrow beam of electrons. such irradiations causes low energy (secondary) electrons to be ejected from the specimen which can then be collected on a positively-charged plate or anode thereby generating an electric signal. |
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