Problem 63. 64 Martian CO, laser. Where sunlight shines on the atmosphere E = 0.289 eV of Mars, carbon dioxide mole- cules at an altitude of about 75 km undergo natural laser action. The energy levels involved in the action are shown in Fig. 40-26; population inversion occurs be- tween energy levels E, and E. (a) What wavelength of sunlight E = 0.165 ev E =0 excites the molecules in the las- Figure 40-26 Problem 64. ing action? (b) At what wave- length does lasing occur? (c) In what region of the electromag- netic spectrum do the excitation and lasing wavelengths lie?
Problem 63. 64 Martian CO, laser. Where sunlight shines on the atmosphere E = 0.289 eV of Mars, carbon dioxide mole- cules at an altitude of about 75 km undergo natural laser action. The energy levels involved in the action are shown in Fig. 40-26; population inversion occurs be- tween energy levels E, and E. (a) What wavelength of sunlight E = 0.165 ev E =0 excites the molecules in the las- Figure 40-26 Problem 64. ing action? (b) At what wave- length does lasing occur? (c) In what region of the electromag- netic spectrum do the excitation and lasing wavelengths lie?
College Physics
1st Edition
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Chapter30: Atomic Physics
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Problem 14CQ: CT scanners do not detect details smaller than about 0.5 Is this limitation clue to the wavelength...
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Transcribed Image Text:Problem 63.
64 Martian CO, laser. Where
sunlight shines on the atmosphere
E = 0.289 eV
of Mars, carbon dioxide mole-
cules at an altitude of about 75
km undergo natural laser action.
The energy levels involved in the
action are shown in Fig. 40-26;
population inversion occurs be-
tween energy levels E, and E.
(a) What wavelength of sunlight
E = 0.165 ev
E =0
excites the molecules in the las-
Figure 40-26 Problem 64.
ing action? (b) At what wave-
length does lasing occur? (c) In what region of the electromag-
netic spectrum do the excitation and lasing wavelengths lie?
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