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A Collection of Atoms Has 20% of the Sample in a State

Question 20

Multiple Choice

A collection of atoms has 20% of the sample in a state A collection of atoms has 20% of the sample in a state above the ground state.If these emit coherent radiation,what is the wavelength of the laser light produced? (c = 3.00 × 10<sup>8</sup> m/s,h = 6.626 × 10<sup>-34</sup> J ∙ s,1 eV = 1.60 × 10<sup>-19</sup> J) A) 210 nm B) 91 nm C) 340 nm D) 34 nm above the ground state.If these emit coherent radiation,what is the wavelength of the laser light produced? (c = 3.00 × 108 m/s,h = 6.626 × 10-34 J ∙ s,1 eV = 1.60 × 10-19 J)


A) 210 nm
B) 91 nm
C) 340 nm
D) 34 nm

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