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I Review | Constants | Perio A glass tube contains 2 x 10" atoms, some of which are in the ground state and some of which are excited. (Figure 1) shows the populations for the atoms' three energy levels. Part A Is it possible for these atoms to be a laser? If so, on which transition would laser action occur? O 3+ 2 O 3+1 O 2+1 O Not possible Figure 1 of 1

I Review | Constants | Perio A glass tube contains 2 x 10" atoms, some of which are in the ground state and some of which are excited. (Figure 1) shows the populations for the atoms' three energy levels. Part A Is it possible for these atoms to be a laser? If so, on which transition would laser action occur? O 3+ 2 O 3+1 O 2+1 O Not possible Figure 1 of 1

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A glass tube contains 2×10112×1011 atoms, some of which are in the ground state and some of which are excited. (Figure 1) shows the populations for the atoms' three energy levels. Is it possible for these atoms to be a laser? If so, on which transition would laser action occur?

**Educational Text: Energy Levels and Population of Atoms for Laser Action** **Overview:** A glass tube contains \(2 \times 10^{11}\) atoms, with varying populations of these atoms in different energy states. Some atoms reside in the ground state, while others are excited. The diagram illustrates the populations across three distinct energy levels. **Figure Analysis:** The figure presents the population distribution of the atoms across three energy states: - **Level 1 (Ground State):** - \(N_1 = 10 \times 10^{10}\) atoms - **Level 2 (p-state):** - \(N_2 = 2 \times 10^{10}\) atoms - **Level 3 (s-state):** - \(N_3 = 8 \times 10^{10}\) atoms **Part A: Possibility of Laser Action** The central question here asks if laser action is possible among these atoms. If it is, which transition would facilitate such an action? - Possible transitions being considered: - From Level 3 to Level 2 - From Level 3 to Level 1 - From Level 2 to Level 1 - A conclusion that laser action is not possible The provided option, "Not possible," suggests that the population inversion required for laser activity is not achieved under the current conditions. **Conclusion:** The educational focus here is to understand the requirements for laser action, such as population inversion, and analyze why certain transitions might not support this phenomenon under given circumstances.
Transcribed Image Text:**Educational Text: Energy Levels and Population of Atoms for Laser Action** **Overview:** A glass tube contains \(2 \times 10^{11}\) atoms, with varying populations of these atoms in different energy states. Some atoms reside in the ground state, while others are excited. The diagram illustrates the populations across three distinct energy levels. **Figure Analysis:** The figure presents the population distribution of the atoms across three energy states: - **Level 1 (Ground State):** - \(N_1 = 10 \times 10^{10}\) atoms - **Level 2 (p-state):** - \(N_2 = 2 \times 10^{10}\) atoms - **Level 3 (s-state):** - \(N_3 = 8 \times 10^{10}\) atoms **Part A: Possibility of Laser Action** The central question here asks if laser action is possible among these atoms. If it is, which transition would facilitate such an action? - Possible transitions being considered: - From Level 3 to Level 2 - From Level 3 to Level 1 - From Level 2 to Level 1 - A conclusion that laser action is not possible The provided option, "Not possible," suggests that the population inversion required for laser activity is not achieved under the current conditions. **Conclusion:** The educational focus here is to understand the requirements for laser action, such as population inversion, and analyze why certain transitions might not support this phenomenon under given circumstances.
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