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. | |
View all MCQs in
Fundamentals of NanoScienceNo comments yet