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1. |
In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of 7.5 × 10-12 m, the minimum electron energy required is close to |
A. | 500 keV |
B. | 1 keV |
C. | 100 keV |
D. | 25 keV |
Answer» E. | |