Question 12: A beam of light travelling in air is incident normally on an air-dielectric interface. The refractive index of the dielectric is25 Which one of the following best approximates the percentage of the incident optical power that is transmitted across the interface? O 18% O 57% O 43% O 82%

Question 12: A beam of light travelling in air is incident normally on an air-dielectric interface. The refractive index of the dielectric is25 Which one of the following best approximates the percentage of the incident optical power that is transmitted across the interface? O 18% O 57% O 43% O 82%

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