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Questions and Answers
What happens when energy is supplied to atoms?
What happens when energy is supplied to atoms?
- They become stable
- They are excited to higher energy levels (correct)
- They become inert
- They release excess energy
What is a metastable state?
What is a metastable state?
- A state of constant excitation
- A state of equilibrium
- A longer lived upper level from where an excited atom does not return to a lower level at once (correct)
- A state of rapid energy release
Why can't population inversion be established in atoms with short-lived excited states?
Why can't population inversion be established in atoms with short-lived excited states?
- Atoms rapidly return to the lower energy state through spontaneous transitions (correct)
- Atoms accumulate at the upper energy level
- Atoms remain in the excited state indefinitely
- Atoms undergo stimulated emission
Why do excited atoms need to 'wait' at the upper energy level to establish population inversion?
Why do excited atoms need to 'wait' at the upper energy level to establish population inversion?
Why do atoms in metastable states not rapidly return to the lower energy level?
Why do atoms in metastable states not rapidly return to the lower energy level?
What is the characteristic of atoms in metastable states?
What is the characteristic of atoms in metastable states?
Why can't population inversion be established in atoms with short-lived excited states?
Why can't population inversion be established in atoms with short-lived excited states?
What is the key requirement to establish population inversion in atoms?
What is the key requirement to establish population inversion in atoms?
What is the significance of a metastable state?
What is the significance of a metastable state?
Why do atoms in metastable states not undergo stimulated emission?
Why do atoms in metastable states not undergo stimulated emission?
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