Practice Amplification Via Stimulated Emission (2.2) - Lasers

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6 sample questions

Question 1.
What is population inversion?
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Think of what it means when we mention excited atoms.
Question 2.
Define stimulated emission in lasers.
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Consider how the incoming photon influences the excited atom.
3Question 3.
What is the primary mechanism for light amplification in a laser?
- Absorption
- Stimulated Emission
- Spontaneous Emission
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Think about how photons are emitted in the laser process.
4Question 4.
True or False: Population inversion occurs naturally without any external energy.
- True
- False
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Consider what is needed to achieve more excited states than ground states.
Question 5.
A laser system has a population of 1000 excited atoms and 500 ground state atoms. Calculate the ratio of excited to ground state atoms required for effective amplification.
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Remember the definition of population inversion.
Question 6.
Design a thought experiment to show how adding more energy to a laser system can maintain population inversion in a fluctuating environment.
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Relate it to how external pumping can sustain the desired state.

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