9. Quantum Mechanics
Photoelectric Effect
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ANSWERS OPTIONS
A
1.97x10-19 photons
B
3.15x1019 photons
C
2.91x1019 photons
D
9.11x10-19 photons
Calculate the number of photons with the lowest possible frequency needed to ionize a sample containing 6.78x1018 atoms if the ionization efficiency is 21.54%. The given first ionization energy of the sample is 2.91 aJ.