Thu December 3, 2020
Everybody loves a blue sky especially when I'm on a beach, it is a good sky with mostly floating white clouds forming different shapes like white smooth cotton. It gives us a reassuring sight that guarantees clear weather and sunny days.
However, what in the world does an Ube (purple) sky mean?
I saw this picture passing by in my Facebook account and to my surprise, this is the first time in my knowledge that a purple sky exists. The common sky's I just witness in my entire life was just dark sky, blue sky, and red sky during sunset.
However, for the others, it is not rare to spot purple skies during nightfalls or in the mornings. They said that sometimes they even appear after hurricanes or typhoons.
Moreover, we need to understand first why the sky is blue before we learn why the sky is purple.
As we know, the light is white, however when you arrange it through a prism, there you see all the various colored light waves in the spectrum such as red, orange, yellow, green, blue, indigo, and violet.
It was said that the light travels in waves, occasionally in short distance ones and other times in long lines with lots of heights.
Light will cross in a straight line unless something gets in its way, just like with the prism or molecules in our atmosphere.
The gaseous particles in the atmosphere scatter light, though, since blue travels on shorter with smaller waves, it results in charged particles to move faster, scattering extra light.
The result is that we see more blue than we do red because blue gives particles worked up more than the other colors. Our eyes are also a bit more sensitive to blue light, which helps a lot to recognize these colors.
We don't know that violet color is always there, but we don't detect it as well as we do blue. So blue gains a victory in the light wave battle for our eyes. However, the right conditions have to be met for the purple color, to be visible in our eyes.
It's a matter of where the sun is coming in at a particular angle for some cases. Several of those colors that get blocked out by blue, like yellow, red, and orange, happen a lot during sunrises and sunsets.
"According to Steven Ackerman -professor of meteorology at the University of Wisconsin–Madison, it is because the sun is low on the horizon, sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky."
"More atmosphere implies more molecules to scatter the violet and blue light away from our eyes."
"If the way is long enough, all of the blue and violet light scatters out of the cord of our sight."
"The other colors continue in their direction to our eyes. This is why sunsets are often yellow, orange, and red."
Regardless, other factors come into play that can jumble up the light waves and the particles even further.
According to Sarah Keith-Lucas from BBC, "dust, pollution, water droplets, and cloud formations" can influence the colors of the sky, similarly."
Sometimes, pink and purple will occur more often than red and orange. This is because in part to the "optical illusion of the pink wavelengths brightening the base of the cloud and these pink clouds superimposed on a dark blue sky. "
"The combination of pink and dark blue can make the sky seem a deep purple."
This is what happens Tuesday in Brgy. Gubat at Mercedes, Camarines Norte. The purple sky appears after the short rain at 5:40 p.m. where the sunset commences.
In the end, obtaining those purple hues is about bringing into the world the right conditions that happen at the right time.
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