Question: ( 4 a ) Calculate ( a ) the numbers of photon, ( b ) wavelength, ( c ) free - space propagation constant (

(4a) Calculate (a) the numbers of photon, (b) wavelength, (c) free-space propagation constant (wave vector) and (d) the momentum of emitting photon for a 10 mW laser
source Ga 0.95 Al .05 As.[Hint: Eg(ev)=1.42+1.26x +0.26 x*, where x =0.05].

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