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 photon is absorbed the electron is in the n = 5 energy level. what was the wavelength of the absorbed photon?

Energy of electron in atom level n =

    When n = 4

   When n = 5

   Energy of photon absorbed = -0.544 - (-0.85) = 0.306 eV = 0.489 * J

 We also have energy of photon =

Comparing both    

So, Energy of photon = 4069 nm

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.