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🎓 Dr. Freemo :jpf: 🇳🇱

@jqmcd

Good catch, and no not a coincident at all.. in fact the reason the sun peaks at that wavelength and the reason our atmosphere is transparent to those wavelenths is in fact the same mechanism.

I explain it here:

qoto.org/@freemo/1112397849794

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🎓 Dr. Freemo :jpf: 🇳🇱

@phreeza Yup that is also true... but in a weird way these are the same thing... see here for a more detailed explanation that goes into this aspect:

qoto.org/@freemo/1112397849794

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🎓 Dr. Freemo :jpf: 🇳🇱 boosted
Simon Waldman

@freemo @drnoble I think there's a more important reason: visible light includes the peak of the sun's output, and is a range in which the atmosphere is transparent.

We see with what is available.

(whether advanced life would have evolved on a planet with shorter wavelengths arriving at the surface is perhaps an interesting question - but that isn't where we live.)

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🎓 Dr. Freemo :jpf: 🇳🇱 boosted
🎓 Dr. Freemo :jpf: 🇳🇱

@simon_on_energy

While you are right, believe it or not your talking about the same thing.

If you look at black body curves of different temperatures, which is rougly what our sun is, then the peak of the light emission at almost any temperature roughly fovers around the same place.

In fact the peak of a blackbody radiation is asymptotic... mean while it does shift the hotter it gets the less it shift.. it approaches a fix point at higher temperatures. See the attached chart for an example of this, notice the verticle line defining the peake of the blackbody curve approaches a vertical line near the higher temperatures.

This asymptopic response is due to the exact same effect im describing. That is the line represents about the point where the mode of quantum interaction is inter-bond vs free electrons. For this reason you are likely to have any star with its peak in roughly the same range.

Likewise the absorption spectrum of our sky lets the peak light of the sun through because again where these two modes interact is "special" and this a lot of gases are more transparent around this region..

In fact I didnt want to go into this but solid materials are more often transparent around visible like than other parts of the spectrum slightly above and glow it (until you get too far away)... its favorability to transparency is also important so it gets through our atmosphere.

So basically while your right these effects of peak of the sun, transmission throught he atmosphere are all important yes, they ultimately all go back to being results of this same principle.

@drnoble

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🎓 Dr. Freemo :jpf: 🇳🇱

@simon_on_energy

While you are right, believe it or not your talking about the same thing.

If you look at black body curves of different temperatures, which is rougly what our sun is, then the peak of the light emission at almost any temperature roughly fovers around the same place.

In fact the peak of a blackbody radiation is asymptotic... mean while it does shift the hotter it gets the less it shift.. it approaches a fix point at higher temperatures. See the attached chart for an example of this, notice the verticle line defining the peake of the blackbody curve approaches a vertical line near the higher temperatures.

This asymptopic response is due to the exact same effect im describing. That is the line represents about the point where the mode of quantum interaction is inter-bond vs free electrons. For this reason you are likely to have any star with its peak in roughly the same range.

Likewise the absorption spectrum of our sky lets the peak light of the sun through because again where these two modes interact is "special" and this a lot of gases are more transparent around this region..

In fact I didnt want to go into this but solid materials are more often transparent around visible like than other parts of the spectrum slightly above and glow it (until you get too far away)... its favorability to transparency is also important so it gets through our atmosphere.

So basically while your right these effects of peak of the sun, transmission throught he atmosphere are all important yes, they ultimately all go back to being results of this same principle.

@drnoble

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🎓 Dr. Freemo :jpf: 🇳🇱

@RnDanger

If our eyes evolved to be underwater we wouldnt have ever really evolved to see red too well. Red is absent very quickly as you go under water.

@falken @freepeoplesfreepress

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🎓 Dr. Freemo :jpf: 🇳🇱

@mur2501 Im not sure im the guy to ask... i can harden a system but its not usually my job.

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🎓 Dr. Freemo :jpf: 🇳🇱 boosted
Clement Tahershamsi :verified:

@freemo Its a circulatory system thing. Heart not as strong and vascular system less rigid than in youth, you end up keeping more fluids in your extremities. Lots of commonly used medications for that age group can also exarcebate the swelling, especially blood pressure meds.

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🎓 Dr. Freemo :jpf: 🇳🇱 boosted
Winchell Chung ⚛🚀

@freemo

In a more scifi military sense, if a space battleship wants to use its laser cannons to strafe ground targets, the laser has to use frequencies longer than the vacuum frequencies or they will be cut off by the atmosphere.

IR is great for a weapon, since heating is hurting. But far infrared gets blocked by moisture in the air.

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🎓 Dr. Freemo :jpf: 🇳🇱

@kilroy_was_here I usually just assume its the french's fault fromt he get go anyway

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🎓 Dr. Freemo :jpf: 🇳🇱 boosted
🎓 Dr. Freemo :jpf: 🇳🇱

You ever wonder why the small band of spectrum we can see (called visible light) is special? I mean almost all animals see in light ranges are are somewhere around here. I mean sure some can see a little farther into IR or UV but in general all animals see roughly around this same narrow band of frequencies in an otherwise infinite spectrum... So what is so special?

Its actually a quantum thing. Everything roughly around visible light and higher interacts with material by electrons jumping energy levels. However IR energy is absorbed by the bonds between molecules instead, which is why IR represents heat.

Basically visible light is right where these two modes intersect. Essentially they are the lowest energy part of the spectrum that is still high enough energy to interact primarily through changing energy levels of electrons. Essentially any more energy and it wont really get through the atmosphere as extreme UV is cut off.. any lower and it wouldnt be very effecieient cause most of the energy goes to heating the eye rather than seeing... So its right in that sweet spot.

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🎓 Dr. Freemo :jpf: 🇳🇱

@murshedz Can you please link the study so we can fact check and learn, thanks.

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🎓 Dr. Freemo :jpf: 🇳🇱 boosted
Simon

@freepeoplesfreepress @freemo
The law quoted in the article:
"It should be pronounced in three (3) syllables, with the final "s" silent, the "a" in each syllable with the Italian sound, and the accent on the first and last syllables"

Italian sound? Sounds to me like it should be A-kan-sAH, -saw doesn't sound very Italian...

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🎓 Dr. Freemo :jpf: 🇳🇱

@SpaceLifeForm

That tracks, cool!

@jmw

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🎓 Dr. Freemo :jpf: 🇳🇱

@niclas

Yes it was a district of Syria at first in 500 BCE it was..

Yes there were times where the region was independent and not ruled by another. But im not sure you can call it a kingdom because im pretty sure they were nomadic and didnt have much need for a more formal government during those periods.

But yea palestine was a region that for much of its history was indeed part of other larger regions/countries.

@admin @ech

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🎓 Dr. Freemo :jpf: 🇳🇱

@argv_minus_one

I was thinking about that.. and im not sure thats entierly accurate.. i mean higher frequencies, sure the super high stuff is obviously very penetrating... but the low stuff seems to be a mixed bag depending on how low and what material.. For example a lot of IR thats at a medium level doesnt penetrate trough too much... but extremely low IR like near 0 hz is going to be very penetrating through a lot of stuff.. but then you also get some weird effects too.

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🎓 Dr. Freemo :jpf: 🇳🇱

@bonifartius

Thanks, I understand your frustration with mandates, I do... but yea its important we try to not let all the ugliness turn us against eachother.. that doesnt do any good for anyone.

I appreciate and respect you recognize that, its why I think so highly of you, your a good person, we all slip up, no worries. Thanks!

@LoganFive @Baley

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🎓 Dr. Freemo :jpf: 🇳🇱

@jmw

The point here is its very individual to the plant but its usually some combination of daylight hours and temperature.

It is very cool though how if you want to raise plant you have to know specifical what signals it so youc an control that.

@SpaceLifeForm

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🎓 Dr. Freemo :jpf: 🇳🇱

@niclas

Assuming that is your question then the earliest known map was in 150 AD, Ptolemy's map of Palestine. It labels the land as "palestini" in greek, essentially Palestine.

There are of course countless maps following that, and the word is recorded to describe the area even earlier than that (though not in map form.

@admin @ech

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🎓 Dr. Freemo :jpf: 🇳🇱

@niclas

If thats what the animation says then I can tell you its complete BS... we know quite well that historically there were states called pallestine .. i mean we have maps with it literally printed on it. and plenty of historic references to palestine...

Is your question what year was the first year we have recorded history of a land called pallestine?

@admin @ech

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