Many problems in modern physics exemplify the quantum nature ofradiation. In the

Question

Many problems in modern physics exemplify the quantum nature ofradiation. In the early part of the 20th century, it was discoveredthat radiation of an appropriate wavelength can promote electrontransitions between the different energy levels within an atom.More specifically, the energy levels of the hydrogen atom werefound to be given by the equation

and a photon that has energy equal to the difference between twoenergy levels can be absorbed by the atom and cause it totransition from the lower energy level to the higher one.

Explanation / Answer

= ' - h / (2 mc)          1-cos = 1 / 2 h / (2 m c) = 6.63 * 10E-34 / (2 * 9.11 * 10E-31 * 3 * 10E8) =6.63 / (6 * 9.11) * 10E-11 = 1.21 * 10E-12 = (8.4 - 1.2) * 10E-12 = 7.2 * 10E-12 V = h c / (e ) = 6.63 * 10E-34 * 3 * 10E8 / (1.6 *10E-19 * 7.2 * 10E-12) V = 6.63 * 3 / (1.6 * 7.2) * 10E5 = 1.73 * 10E5 = 173 kV

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