n (Fresnel’s formulae) If i is the angle of incidence, r the angle of refraction, n 1 the index of refraction for air (nearly equal to unity), n 2 index of refraction for a medium, then the ratio of the reflected light to the incident light is,
If i = 0 (normal incidence), and n 1 = 1 (approximate for air),
(Weast RC (ed) Handbook of chemistry and physics, 52nd edn. CRC Press, Boca Raton, FL).
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Gooch, J.W. (2011). Reflection of Light by a Transparent Medium in Air. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_9862
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