Physics, asked by Snayek, 10 days ago

In a certain four-level laser (Sec. 4.9), the final state of the laser transition is 0.03 eV above the ground state. What fraction of the atoms are in this state at 300 K in the absence of external excitation? What is the minimum fraction of the atoms that must be excited in order for laser amplification to occur at this temperature? Why? How is the situation changed at 100 K? Would you expect cooling a three-level laser to have the same effect?​

Answers

Answered by adititiwari695
1

Answer:

the ground state is one of the two levels involved in the lasing transition of the 3-level laser. In order to amplify light by stimulated emission, ...

Explanation:

.9), the final state of the laser transition is 0.03 eV above the ground state. What fraction of the atoms are in this state at 300 K in ...

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