From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #4454 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Friday, June 26 2020 Volume 14 : Number 4454 Today's Subjects: ----------------- Whatâs stopping you? ["Simplicity" ] ---------------------------------------------------------------------- Date: Fri, 26 Jun 2020 10:24:38 -0400 From: "Simplicity" Subject: Whatâs stopping you? Whatbs stopping you? http://strategys.bid/4-WBm-LTbMmEdH6ZldmkNpkEJ0MmHI0ASBe1-QNsfkMjuLct http://strategys.bid/BInH3EgK86A5ZxhQH5i7437NcfEIBXhCcRUl2a8Z3OFPof0e Scattering also occurs even more strongly in clouds. Individual water droplets exposed to white light will create a set of colored rings. If a cloud is thick enough, scattering from multiple water droplets will wash out the set of colored rings and create a washed-out white color.[clarification needed] The sky can turn a multitude of colors such as red, orange, purple and yellow (especially near sunset or sunrise) when the light must pass through a much longer path (or optical depth) through the atmosphere. Scattering effects also partially polarize light from the sky and are most pronounced at an angle 90B0 from the sun. Scattered light from the horizon travels through as much as 38 times the atmosphere as does light from the zenith, causing a blue gradient: vivid at the zenith, and pale near the horizon. Because red light also scatters if there is enough air between the source and the observer causing parts of the sky to change color during a sunset. As the amount of atmosphere nears infinity, the scattered light appears whiter and whiter. The sun is not the only object that may appear less blue in the atmosphere. Far away clouds or snowy mountaintops may appear yellowish. The effect is not very obvious on clear days but is very pronounced when clouds cover the line of sight, reducing the blue hue from scattered sunlight. At higher altitudes, the sky tends toward darker colors since scattering is reduced due to lower air density; an extreme example is the moon, where there is no atmosphere and no scattering, making the sky on the moon black even when the sun is visible. Sky luminance distribution models have been recommended by the International Commission on Illumination (CIE) for the design of daylighting schemes. Recent developments relate to "all sky models" for modelling sky luminance under weather conditions ranging from clear to overcast. Dusk and dawn The crescent moon remains visible just moments before sunrise Main articles: Earth's shadow, Green flash, and Sky brightness The intensity of the sky varies greatly over the day, and the primary cause of that intensity differs as well. When the sun is well above the horizon, direct scattering of sunlight (Rayleigh scattering) is the overwhelmingly dominant source of light. However, in twilight, the period of time between sunset and night and between night and sunrise, the situation is more complicated. Green flashes and green rays are optical phenomena that occur shortly after sunset or before sunrise, when a green spot is visible above the sun, usually for no more than a second or two, or it may resemble a green ray shooting up from the sunset point. Green flashes are a group of phenomena that stem from different causes, most of which occur when there is a temperature inversion (when the temperature increases with altitude rather than the normal decrease in temperature with altitude). Green flashes may be observed from any altitude (even from an aircraft). They are usually seen at an unobstructed horizon, such as over the ocean, but are also seen over cloud tops and mountain tops. Green flashes may also be observed at the horizon in association with the Moon and bright planets, including Venus and Jupiter. The Earth's shadow is the shadow that the Earth casts on its atmosphere. This atmospheric phenomenon is sometimes seen twice a day, around the times of sunset and sunrise. When the weather conditions and the observer's viewing point permit a clear sight of the horizon, the shadow can be seen as a dark blue or greyish-blue band. Assuming the sky is clear, the Earth's shadow is visible in the half of the sky opposite to the sunset or sunrise, and is seen as a dark blue band right above the horizon. A related phenomenon is the "Belt of Venus" or "anti-twilight arch", a pink band that is visible above the dark blue band of the Earth's shadow in the same part of the sky. There is no clear dividing line between the Earth's shadow and the Belt of Venus: one colored band shades into the other in the sky ------------------------------ End of alt.music.moxy-fruvous digest V14 #4454 **********************************************