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An electron is in the ground state of an infinite square well. The energy of the...

An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 1.39 eV. Use hc=1240 nm eV.

(a) What wavelength of electromagnetic radiation would be needed to excite the electron to the n = 3 state?
  nm

(b) What is the width of the square well?
nm

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