2)The eftect of 8timu emissionson the Change of Plane count and EE Can be expressed b3theeguatien )dN2/ht= -32) N21P ()-A2IN2 4) dur/dt=-B2INIP(U)4B2IN2

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The effectof stimulated and spenteneous
emissionson the change of Plkane count andd
EE Can be expressed bthe eguation
DdN2/4t= -1321 N21P(2)-A2IN9
2)dN2/dt=+22IN2P(V) + A12N+
Transcribed Image Text:The effectof stimulated and spenteneous emissionson the change of Plkane count andd EE Can be expressed bthe eguation DdN2/4t= -1321 N21P(2)-A2IN9 2)dN2/dt=+22IN2P(V) + A12N+
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