A GaAs injection laser with an optical cavity has refractive index of – McqOptions

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1.	A GaAs injection laser with an optical cavity has refractive index of 3.6. Calculate the reflectivity for normal incidence of the plane wave on the GaAs-air interface.
A.	0.61
B.	0.12
C.	0.32
D.	0.48
Answer» D. 0.48

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