Essential University Physics: Volume 2 (3rd Edition)
Essential University Physics: Volume 2 (3rd Edition)
3rd Edition
ISBN: 9780321976420
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 37, Problem 30P
To determine

The energy levels between which the transition takes place.

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Cold interstellar molecular clouds often contain the molecule cyanogen (CN), whose first rotational excited states have an energy of 4.7x 10-4 eV (above the ground state). There are actually three such excited states, all with the same energy. In 1941, studies of the absorption spectrum of  starlight that passes through these molecular clouds showed that for every ten CN molecules that are in the ground state, approximately three others are in the three first excited states (that is, an average of one in each of these states). To account for this data, astronomers suggested that the molecules might be in thermal equilibrium with some "reservoir" with a well-defined temperature. What is that temperature?*
For a certain diatomic molecule, the lowest-energy photon in the vibrational spectrum is 0.17 eV.What is the energy of a photon emitted in a transition from the 5th exited vibrational energy level to the 2nd  exited vibrational energy level, assuming no change in the rotational energy?
What is the energy of a photon emitted from a CO molecule that transitions from the rotational Ji to Ji-1 level.  Express your answer in units of ℏ^2/I, so you just have an integer value as a final answer. Values: Ji = 3 The equation I have in the teacher's ppt is E_rotational = (J*(J+1)*ℏ^2)/(2*I)

Chapter 37 Solutions

Essential University Physics: Volume 2 (3rd Edition)

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