Ruby lases at a wavelength of 694 nm. A certain ruby crystal has 4.00xx10^(19)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 1.50mus. 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?

Ruby lases at a wavelength of 694 nm. A certain ruby crystal has 4.00x

1.	Ruby lases at a wavelength of 694 nm. A certain ruby crystal has 4.00xx10^(19)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 1.50mus. 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?
Answer» SOLUTION :`1.5xx10^(6)J//s=1.5xx10^(6)W`

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