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dedylja [7]
3 years ago
14

An electron is trapped in a 1-dimensional box that is 576 nm wide. initially, it is in the n = 4 energy level, but after a photo

n is absorbed the electron is in the n = 5 energy level. what was the wavelength of the absorbed photon?
Physics
1 answer:
Paraphin [41]3 years ago
4 0

Energy of electron in atom level n = \frac{-13.6 }{n^2} eV

    When n = 4

          E_4 = \frac{-13.6}{4^2} eV = -0.85 eV

   When n = 5

          E_5 = \frac{-13.6}{5^2} eV = -0.544 eV

   Energy of photon absorbed = -0.544 - (-0.85) = 0.306 eV = 0.489 * 10^{-19} J

 We also have energy of photon = \frac{hc}{\lambda } = \frac{1.99*10^{-25}}{\lambda}

Comparing both    

    0.489 * 10^{-19}= \frac{1.99*10^{-25}}{\lambda}\\ \\ \lambda = 4.069*10^{-6}m = 4069 nm

So, Energy of photon = 4069 nm

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Answer:

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4 years ago
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A spring with a spring constant of 4 N/m is stretched by Sarah's dog until extended by 2 m. How much elastic potential energy is
azamat

Hi there!

Recall the equation for spring potential energy:

PE = \frac{1}{2}kx^2

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8 0
3 years ago
Which of these is true of a chemical reaction? (a) energy is always transferred from reactants to products. (b) Energy is transf
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Nutritionists call the calories found in junk food _____ calories due to lack of quality nutrients.
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Answer:

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a student attaches a 0.5 kg object to a 0.7 m string and rotates the object around her head and parallel to the ground. how much
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The object would have a centripetal acceleration <em>a</em> of

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(rounding to 1 significant digit)

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