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Kowalska's diary relates the rays of light within the image to life and salvation, stating (Notebook 1, item 299) that she was told by Jesus: "The two rays denote Blood and Water. The pale ray stands for the Water which makes souls righteous. The red ray stands for the Blood which is the life of souls....
An example of this phenomenon is when clean air scatters blue light more than red light, and so the midday sky appears blue (apart from the area around the Sun which appears white because the light is not scattered as much). The optical window is also referred to as the "visible window" because it overlaps the human visible response spectrum.
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The rays represent luminous intensity, which varies according to Lambert's cosine law for an ideal diffuse reflector. Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection.
Because light specularly reflected from water does not usually reach the viewer, water is usually considered to have a very low albedo in spite of its high reflectivity at high angles of incident light. Note that white caps on waves look white (and have high albedo) because the water is foamed up, so there are many superimposed bubble surfaces ...
Beam of sun light inside the cavity of Rocca ill'Abissu at Fondachelli-Fantina, Sicily. The speed of light in vacuum is defined to be exactly 299 792 458 m/s (approximately 186,282 miles per second). The fixed value of the speed of light in SI units results from the fact that the metre is now defined in terms of the speed of light.
The white rays issuing from behind the rose at the inner angles between the arms of the cross are the rays of the divine light issuing and coruscating from the reflected light of kether in its center; and the letters and symbols on them refer to the analysis of the key word: I.N.R.I. [citation needed]
The width of the blue ring between the white sun and the 12 white rays with pointed angles is equivalent to 1/15 of the diameter of the white sun. The top angle of each white ray with a pointed angle is 30 degrees, with the 12 rays totaling 360 degrees. The upper, lower, left and right sides of the white rays with pointed angles shall be facing ...