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An electron has a kinetic energy of 10.1 eV. The electron is incident upon a rectangular barrier of height 18.2 eV and width 1.00 nm. If the
Question
An electron has a kinetic energy of 10.1 eV. The electron is incident upon a rectangular barrier of height 18.2 eV and width 1.00 nm. If the electron absorbed all the energy of a photon of green light (with wavelength 546 nm) at the instant it reached the barrier, by what factor would the electron’s probability of tunneling through the barrier increase
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Physics
3 years
2021-08-24T02:19:25+00:00
2021-08-24T02:19:25+00:00 1 Answers
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Answer:
factor that the electron’s probability of tunneling through the barrier increase 2.02029
Explanation:
given data
kinetic energy = 10.1 eV
height = 18.2 eV
width = 1.00 nm
wavelength = 546 nm
solution
we know that probability of tunneling is express as
probability of tunneling =
……………..1
here C is =![Rendered by QuickLaTeX.com \frac{\sqrt{2m(U-E}}{h}](https://documen.tv/wp-content/ql-cache/quicklatex.com-5a66746b7a911c05ec9e9b9d4a1326ce_l3.png)
here h is Planck’s constant
c =
c = 2319130863.06
and proton have hf =
= 2.27 ev
so electron K.E = 10.1 + 2.27
KE = 12.37 eV
so decay coefficient inside barrier is
c’ =
c’ =
c’ = 1967510340
so
the factor of incerease in transmisson probability is
probability =![Rendered by QuickLaTeX.com e^{2L(c-c')}](https://documen.tv/wp-content/ql-cache/quicklatex.com-4d018efdddaee54ab92740cc7ce6485a_l3.png)
probability =![Rendered by QuickLaTeX.com e^{2\times 1\times 10^{-9} \times (351620523.06)}](https://documen.tv/wp-content/ql-cache/quicklatex.com-60906c26ccb96b141d790f5da1a12507_l3.png)
factor probability = 2.02029