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| 1. |
A hypothetical atom has two energy levels, with a transition wavelength between them of 580 nm. In a particular sample at 300 K, 4.0xx10^(20) such atoms are in the state of lower energy. (a) How many atoms are in the upper state, assuming conditions of thermal equilibrium? (b) Suppose, instead, that 3.0xx10^(20) of these atoms are ''pumped'' into the upper state by an external process, with 1.0xx10^(20) atoms remaining in the lower state. |
| Answer» Solution :(a) `5.0xx10^(-16)ltlt1`, so no electron, (B) 68 J | |