STUDY GUIDE 5, SELF TEST 2

© Department of Physics, University of Guelph.

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1 (a)
The p-electronic energy level diagram of a molecule is shown at the left. If a photon of wavelength 118.4 nm is absorbed by the molecule what is the resultant energy level diagram?

(b) Would a photon with l = 473 nm be absorbed?

2. A molecule in which there is a sequence of conjugated double bonds 10 atoms long is observed to have a maximum absorption at 450 nm. For a similar molecule in which the conjugated sequence is only 6 atoms long, at what energy would you expect to find the maximum absorption?

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