When light interact with matter, three processes may occur (a) absorption (b) spontaneous emission and (c) stimulated em

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When light interact with matter, three processes may occur (a) absorption (b) spontaneous emission and (c) stimulated em

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When Light Interact With Matter Three Processes May Occur A Absorption B Spontaneous Emission And C Stimulated Em 1
When Light Interact With Matter Three Processes May Occur A Absorption B Spontaneous Emission And C Stimulated Em 1 (26.38 KiB) Viewed 95 times
When light interact with matter, three processes may occur (a) absorption (b) spontaneous emission and (c) stimulated emission. “If we consider a He-Ne laser at normal equilibrium conditions laser we won't be able to achieve laser action in the optical range (n=400nm - 700 nm).” Explain this statement with the help of equations and give typical values to ascertain your argument?
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