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Define stimulated emission
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GPT 3.5
Stimulated emission refers to a process in which an excited atom or molecule releases a photon (light particle) when it is interacted with by another photon of the same energy or frequency. This process is a fundamental principle in the functioning of lasers.
In stimulated emission, an electron in an excited state of an atom or molecule is induced to transition to a lower energy state by the presence of an incident photon of the same energy. This incident photon stimulates the release of a secondary photon, resulting in two identical photons being emitted in the same direction and with the same frequency, phase, and polarization.
Stimulated emission is a key component in the amplification of light in lasers. When a medium (such as a solid crystal, gas, or liquid) containing a large number of atoms or molecules in an excited state is subject to external pumping, the stimulated emission process can lead to the emission of a coherent and intense beam of light, forming a laser beam. This amplification of light through stimulated emission enables lasers to be used in various applications, including telecommunications, medicine, industry, and research.
In stimulated emission, an electron in an excited state of an atom or molecule is induced to transition to a lower energy state by the presence of an incident photon of the same energy. This incident photon stimulates the release of a secondary photon, resulting in two identical photons being emitted in the same direction and with the same frequency, phase, and polarization.
Stimulated emission is a key component in the amplification of light in lasers. When a medium (such as a solid crystal, gas, or liquid) containing a large number of atoms or molecules in an excited state is subject to external pumping, the stimulated emission process can lead to the emission of a coherent and intense beam of light, forming a laser beam. This amplification of light through stimulated emission enables lasers to be used in various applications, including telecommunications, medicine, industry, and research.