An electron is accelerated through a potential difference of 12.1 V.
n=5 -0.54eV
n=4 -0.8 eV
n=3 -1.5 eV
n=2 -3.4 eV
n=1 -13.6 eV
(a) How much kinetic energy has it gained in (i) electronvolts (ii) joules? (b) This electron hits a hydrogen atom and excites it. (i) Explain what is meant by excitation
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Expert's answer
2020-11-16T06:36:56-0500
(a)
"E=e\\Delta\\varphi=1.6\\cdot10^{-19}\\cdot12.1=1.9\\cdot10^{-18}" J (ii)
"E=12.1" eV (i)
(b)
Excited state is any quantum state of the system that has a higher energy than the ground state (that is, more energy than the absolute minimum).
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