Ruby lases at a wavelength of 694 nm. A certain ruby crystal has 4.00 x 1019 Cr ions (which are the atoms that lase).The lasing transition is between the first excited state and the ground state, and the output is a light pulse lasting 2.00 μs. As the pulse begins, 60.0% of the Cr ions are in the first excited state and the rest are in the ground state. What is the average power emitted during the pulse?