Absorption

1. Cu+2(aq) absorbs yellow light but has a low extinction coefficient. What transition is involved with this absorption? Is it an allowed or unallowed transition? Explain how you know that from both the experimental data and how you know from theory.

2.

In the picture is shown the absorbance of a 0.00001 M solution of compound, Q, in a 1 cm cuvet. What is the molar extinction coefficient at its maximum? What is its cross section, s? Is it an allowed or unallowed transition? Explain how you know that from the experimental data.

3. Explain what fluorescence and phosphorescence are both in terms of experimentally how they differ and how they differ in terms of the tranistions involved..

4. Show how the energy states of Cr+3 in a ruby laser can lead to lasing.