Which of the following is the ideal vacuum for electron spectrometers?
A. 10-6 torr
B. 10-7 torr
C. 10-8 torr
D. 10-9 torr
Answer:A
Which of the following is the ideal vacuum for electron spectrometers?
A. 10-6 torr B. 10-7 torr C. 10-8 torr D. 10-9 torr
Explanation: 10-6 torr is the ideal vacuum for electron spectrometers. Vacuum below 10-6torr can also be used.