Physics, 26.11.2019 17:31 eylinglez3ovm16v
The laser transition in neon at 6328 å is doppler broadened by the thermal motion of the atoms at a gas temperature of ~300oc (assume pure ne20). (volume = 1 cm3.) (a) what is the full width at half maximum of the transition? (ans. 1.81 ghz.) (b) suppose that a he: ne laser tube is placed inside a cavity 1 m long. how many temo. o.q modes are within ±δv/2 of the line center? (ans. 12.) (c) the energy of the upper state, 3 s2, is 166,658.484 cm-1 above the ground state. express the upper-and lower-state energies in ev. what is the quantum efficiency of this laser? (d) find the stimulated emission cross section given that a21 = 6.56 x 107 sec-1. (e) if the density of excited neon atoms in state i (j1 = 2) is 1010 cm-3, how many excited atoms in state 2 (j2 = 1) are required to establish a small-signal gain coefficient of 5%/m?
Answers: 3
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What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight
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Which lists correctly orders nuclear reactions from most radioactive waste generated to least waste generated within a given period of time? o a. radioactive decay, nuclear fission, nuclear fusion o b. radioactive decay, nuclear fusion, nuclear fission o c. nuclear fusion, nuclear fission, radioactive decay o d. nuclear fission, nuclear fusion, radioactive decay
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The laser transition in neon at 6328 å is doppler broadened by the thermal motion of the atoms at a...
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