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Light scattering

Light scattering

particles suspended in a solution will cause scattering of light and the extent of the scattering is related to the size and shape of the particles (in a somewhat complex relationship).


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Re: Why are leaves green?

... organisms. Purple bacteria existed already, they absorb green light and reflect blue and red(that's why they are purple). They don't use ... lack of light. Every photon is precious in the struggle for life. The scattering/sharing argument is just not the way biology works. Evolution ...

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by stauffie
Fri Apr 06, 2012 2:00 pm
 
Forum: Botany Discussion
Topic: Why are leaves green?
Replies: 76
Views: 297712

Why are leaves green?

... absorbtion, Carotenoids, Chlorophyll b and Chlorophyll a are the major light aborbing pigments in the plant and form part of the light absorbing ... be destroyed. As antosianin absorbs green light reducing green light scattering. As a side note, shade plants do absorb green light by use of ...

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by Marnitz
Sat Jun 11, 2011 2:45 pm
 
Forum: Botany Discussion
Topic: Why are leaves green?
Replies: 76
Views: 297712

Re:

... to absorbance? No they are not. The bacteria are not absorbing the light. You are truly measuring absorbance when you measure concentration ... or proteins or pigment. But for particles like bacteria, it is just the scattering of the light (% transmission) that is measured, so the wave length ...

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by canalon
Mon Dec 13, 2010 4:44 pm
 
Forum: Cell Biology
Topic: Measuring OD
Replies: 5
Views: 4597

Measuring OD

... a spectrophotometer, you are not really measuring the absorption of light, but its scattering by the particles (cells). And it is the same at any wavelength. The only thing that ...

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by canalon
Fri Dec 10, 2010 4:11 pm
 
Forum: Cell Biology
Topic: Measuring OD
Replies: 5
Views: 4597

Re: Why are leaves green?

... may propagate and, for them, it is surely good to share. About scattering: both at dawn and at sunset, the bluish part of the spectrum is scattered more than the red-yellowish part (the distance light has to travel through atmosphere is greater). Blue light is not scattered ...

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by CaduSaMotta
Fri Nov 28, 2008 5:27 pm
 
Forum: Botany Discussion
Topic: Why are leaves green?
Replies: 76
Views: 297712
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