Why did god put the wrong sun in the sky?, page 1
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reply posted on 9-3-2009 @ 01:59 AM by Mr Headshot
reply to post by OzWeatherman



You do realise chlorophyll is pretty much an enhanced pigment right? Plants are green because they don't absorb green. It's reflected, they absorb all the other spectrum colors, usually.

As to the sun being green, I don't know astrobiology at all so I was just going with what OP said.


reply posted on 9-3-2009 @ 02:01 AM by pikypiky
reply to post by OzWeatherman



Wow, Oz! I didn't know your knowledge-base goes beyond that of weather-related issues.

Why did god put the wrong sun in the sky?

Anyway, back to the topic: Maybe there are other 'universes' with other colored suns. Ours just happens to be 'yellow'. I think that golden sun of ours is just perfect and not wrong in the least!

[edit on 2009-3-09 by pikypiky]


reply posted on 9-3-2009 @ 02:03 AM by OzWeatherman
Originally posted by Mr Headshot
reply to
post by OzWeatherman



You do realise chlorophyll is pretty much an enhanced pigment right? Plants are green because they don't absorb green. It's reflected, they absorb all the other spectrum colors, usually.


Yes that is correct, but the reason they are green is because chlorophyll is composed of green pigment which in a large sense is due to sunlight, but not "green" sunlight like the Op is claiming


reply posted on 9-3-2009 @ 02:05 AM by elston



reply posted on 9-3-2009 @ 02:40 AM by Mr Headshot
reply to post by Phage



Oh wow, I didn't know the bit about two different kinds of cholorphyll, that's nifty.

I knew the sun peaks in violet, duh ultraviolet. I'm just a forgetfull dummy tonight.

star for you


reply posted on 9-3-2009 @ 02:46 AM by staple
Everything your eye sees is because of the reflected, absorbed, or transmitted wavelength of the object.

Source

In the same way fat provides the most efficient calories for humans, red light provides the most efficient food for plants. However, a plant illuminated only with red or orange light will fail to develop sufficient bulk. Leafy growth (vegetative growth) and bulk also require blue light. Many other complex processes are triggered by light required from different regions of the spectrum. The correct portion of the spectrum varies from species to species. However, the quantity of light needed for plant growth and health can be measured, assuming that all portions of the spectrum are adequately covered. Light for plants cannot, however, be measured with the same standards used to measure light for humans.

Source


reply posted on 9-3-2009 @ 02:53 AM by debunky
hypertextbook.com...

5 sources all putting the peak at 500 nm. That is green.

But i must confess that i didnt put this down very accurately. But doesnt it seem like a bit of a waste to have plants absorb red &blue and not use green. (didnt know that about a & b either. thx phage)


reply posted on 9-3-2009 @ 03:36 AM by Phage
reply to post by debunky


It seems those sources all use calculated values (based on estimated temperatures for the sun) rather than measured values for peak radiation levels. I think that accounts for the difference. Apparently the Sun may be a little hotter than the values used for the calcs.

Another thing to keep in mind is that absorption by the atmosphere flattens the curve significantly, reducing the difference between the visible wavelengths.
solar irradiance

I think 500nm can be classified as blue-green, but that is a bit of a moving target.
Blue Light The visible blue light has a wavelength of about 475 nm. Because the blue wavelengths are shorter in the visible spectrum, they are scattered more efficiently by the molecules in the atmosphere. This causes the sky to appear blue.

Green Light The visible green light has a wavelength of about 510 nm. Grass, for example, appears green because all of the colors in the visible part of the spectrum are absorbed into the leaves of the grass except green. Green is reflected, therefore grass appears green.

eosweb.larc.nasa.gov...

[edit on 3/9/2009 by Phage]


reply posted on 9-3-2009 @ 04:00 AM by OzWeatherman
reply to post by pikypiky



Thanks piky

I know a bit, but its a long time since I did anything like this. Last time was in college which was five years ago, lol....thats why I asked Phage to come here, he's the real expert

To the Op, were you refering to the sun being green or the green spectrum within the sunlight...bit confused
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