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A plane electromagnetic wave of frequency ω is incident normally on an air-dielectric interface. The dielectric is linear, isotropic, non-magnetic and its refractive index is n. The reflectance (R) and transmittance (T) from the interface are

A plane electromagnetic wave of frequency ω is incident normally on an air-dielectric interface. The dielectric is linear, isotropic, non-magnetic and its refractive index is n. The reflectance (R) and transmittance (T) from the interface are Correct Answer $$R = {\left( {\frac{{n - 1}}{{n + 1}}} \right)^2},\,T = \frac{{4n}}{{{{\left( {n + 1} \right)}^2}}}$$

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