Vol. 9, issue 05, article # 4

Terent'ev Yu. I. Some specific features of refraction of glancing light and light passing through a refractive surface from air to glass. // Atmospheric and oceanic optics. 1996. V. 9. No. 05. P. 374-379.    PDF
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Abstract:

It has been found experimentally that when glancing light is refracted, the maximum intensity in a refracted beam is caused by rays that initially propagate at a distance of about 5 mm from a refractive surface. The reason for the formation of the refracted edge rays has been elucidated. The maximum intensities of the refracted and glancing beams have been compared. It has been established that the maximum intensity of the refracted beam passing from air to glass is equal to that of the beam passing from transparent glass to liquid. It has been proved experimentally that the main contribution to the refracted glancing beam passing from air to glass comes from the initial region of the face about 1 mm in length. The reason for this is clarified. The efficiency of light ray deflection in this zone has been increased. The reason for a delayed decay of the intensity of the refracted light with the increase of the angle of departure of rays leaving the refractive surface has been given.