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When sunlight shines on the atmosphere, mass of CO_(2) at an altitude of 75 km undergo natural laser action. The energy levels involved in the action are shown in fig Population inversion occurs between levels E_2 and E_1. 66. The wavelength of sunlight exciting the molecules in laser action is |
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Answer» 25010 Å `(hc)/(lambda_(ex))=E_(2)-E_(0)` `lambda_(ex)="wavelength of exciting radiation"` `(lambda_(ex))/(hc)=(1)/(E_(2)-E_(0))` `rArr lambda_(ex)=(hc)/(E_(2)-E_(0))` `=(6.63 xx 10^(-34) xx 3 xx 10^(8))/((0.289-0) xx 1.6 xx 10^(-19))m` `=43015Å` |
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