The momentum of photons corresponding to the minimum wavelength emitted from x-ray tube whose operating voltage is 120 kV is ( )
举一反三
- If we have a tungsten anode (work function f=4.63 eV) and electron acceleration voltage of 35 kV, what is the minimum wavelength of the x rays? ( )
- The continuum spectrum of X ray comes from ( )
- When a BJT is operating in the active region, the voltage drop from the base to the emitter VBE is approximately equal to the____ A: base bias voltage B: base current times the base resistor C: diode drop (about 0.7 V) D: emitter voltage
- An X-ray tube operates at 100 kV. The maximum speed of electrons striking the anticathode is ( )
- An electron whose orbital quantum number is 2 has the length of angular momentum ( ).