Essential University Physics
Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
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Chapter 35, Problem 43P

(a)

To determine

The different wavelengths of spectral lines emitted as the electrons cascade to the ground state through all possible downward transitions.

(b)

To determine

The wavelengths of photons emitted in electron transition.

(c)

To determine

The region of the electromagnetic spectrum as found in part (b).

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The electrons within the T-system of conjugated hydrocarbons may be treated as particles confined within a one-dimensional box. The lowest energy transition in the spectrum of a polyene hydrocarbon corresponds to excitation of an electron from the highest occupied energy level to the lowest unoccupied level. If the hydrocarbon contains 6 electrons and has a spectral transition at a wavelength of 278 nm, estimate the effective length of the TT-system. The estimated length = nm. Hint: you will need to fill the energy diagram to know which energy levels are involved in the transition. me = 9.110 x 1031 kg (Enter in e-notation, e.g. 1.23e-4, tolerance ±5%)
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