To make an efficient laser while pumping a three-state system, which of the following conditions is necessary? (note: the lowest atomic energy state is referred to as #1, the first excited state [middle energy level] is referred to as #2, and the 2nd excited state [the highest energy state] is referred to as #3)a) The lifetime of the excited energy state at level 2 should be fairly longb) The lifetime of the excited energy state at level 2 should be fairly shortc) The lifetime of the excited energy state at level 2 doesn't matterd) None of the above
Answers: 3
Physics, 21.06.2019 22:10
Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.
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Physics, 22.06.2019 06:30
At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid
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Physics, 22.06.2019 17:20
Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums
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To make an efficient laser while pumping a three-state system, which of the following conditions is...
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