38. Suppose an electron is trapped in a one-dimensional infinite well of width L = 2 nm: U = 0 from 0 to L, U =∞o everywhere else. Obviously the particle can never climb out of well. Which of the following values is closest to the energy of the photon (in eV) that emits when the electron make the transition from level n = 4 to n= 3. (h = 6.6✖m2kg/s； me = 9.1x10kg)
(A) 0.02
(B) 0.06
(C)0.2
(D)0.6
(E) 2.0

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統計： A(0), B(0), C(0), D(5), E(1) #2993337

詳解 (共 1 筆)

#7295239
E=n2h2 /8mL2
ΔE = (16-9)x(6.636 x 10 -34  )2 / 8 x 9.1 x 10-31 x (2 x 10-9 )2 = 1.06 x 10-19 (J)
= 1.06 x 10-19 / 1.6 x 10-19 (eV)
= 0.6 eV
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