the angle that a ray (of solar energy, for example) makes with a lineperpendicular to the surface. For example,a surface that directly faces the sun has a solar angle of incidence of zero, but ifthe surface is parallel to the sun (for example, sunrise striking a horizontal rooftop),the angle of incidence is 90°. The figure accompanying the description ofairmass illustrates a solar angle of incidence of48.2° to a horizontal surface.
20/02/2019 6:18:00 Angle of Incidence Angle of Incidence
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