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wrote...
Educator
5 years ago Edited: 5 years ago, bio_man
It seems that color / wavelength are fixed based on absorb and radiate energy levels. so why apple is red? which orbit levels are related to absorb and radiate energy (red color wavelength)? is the distance between orbit levels fixed within N2 (Blue) and O2 (Yellow or Orange) structure?

What makes an apple red or green depends on the molecules contained in the pigment making up the apple. I'm not sure what makes up the red color in apples. Nitrogen and oxygen aren't the only elements that produce a certain color.

Quote
which orbit levels are related to absorb and radiate energy (red color wavelength)? is the distance between orbit levels fixed within N2 (Blue) and O2 (Yellow or Orange) structure?

My knowledge in quantum physics is quite limited.

Furthermore, when red color wavelength do not change any orbit levels within N2 or O2 atom, does red color wavelength just pass through atom without any interaction with atom's electrons?

Probably it reflects off the atom's nucleus while the other wavelengths are absorbed.

I would like to check H2O absorption spectrum and confirm on whether blue color from ocean is related to H2O absorption spectrum or not.

Quote
When you know on how to use the reference, could you please also check on H2O absorption spectrum as well?



Source: Link

Caption:
Absorption spectrum (attenuation coefficient vs. wavelength) of liquid water (red), atmospheric water vapor (green) and ice (blue line) between 667 nm and 200 μm.


wrote...
Educator
5 years ago
Once I study it, and learn how to read it, I'll reply back. Also, if you figure it out before me, let us know.

The closest thing I found to a "tutorial" is https://www.physics.utoronto.ca/~phy293lab/experiments/rydberg.pdf

Also uploaded it to our resources in case the link dies: https://biology-forums.com/index.php?action=downloads;sa=view;down=11148
oemBiology Author
wrote...
5 years ago
I find good source of wavelength spectrum (atom element ONLY) from following reference in library, but I cannot find wavelength spectrum for CO2 and OH-.

CRC Handbook of Chemistry and Physics (Ch. 10)

Do you have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)
wrote...
Educator
5 years ago
I find good source of wavelength spectrum (atom element ONLY) from following reference in library, but I cannot find wavelength spectrum for CO2 and OH-.

There's a difference between the emission spectrum of molecules versus pure elements.

I found an article maybe that might shed some light on CO2, attached...

https://www.sciencedirect.com/science/article/pii/S1062289649800717
 Attached file 
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oemBiology Author
wrote...
5 years ago
Do you have any suggestions on what wavelength spectrum is represented by 4.3u?

Thanks, to everyone very much for any suggestions (^v^)
wrote...
Educator
5 years ago
Do you have any suggestions on what wavelength spectrum is represented by 4.3u?

Thanks, to everyone very much for any suggestions (^v^)

The articles mentions that the emission spectrum is in the infrared spectrum, 4.26 \(\mu M\).
oemBiology Author
wrote...
5 years ago
4.3um = 4300nm, which CO2 belong to infrared wavelength.  I get it.

Thanks, to everyone very much for any suggestions (^v^)
wrote...
Educator
5 years ago
OH-

\(\sim 3.0\ \mu m\)

Source https://www.nasa.gov/mission_pages/LCROSS/main/prelim_water_results.html
https://en.wikipedia.org/wiki/Hydroxy_group
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