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Home » Discuss » Archives » General Discussion (1/22-2007 thru 12/14/2010) |
Winterblues (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:18 AM Original message |
What color absorbs more light and heat, black or green? |
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Occam Bandage (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:19 AM Response to Original message |
1. Because sunlight is not pure white. |
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Winterblues (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:20 AM Response to Reply #1 |
2. White reflects sunlight but black absorbs it. |
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Occam Bandage (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:22 AM Response to Reply #2 |
6. Right. Black is the absorption of all wavelengths. |
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tridim (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:25 AM Original message |
Although I've certainly seen plants that have almost black leaves. |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:32 AM Response to Original message |
28. And poinsettia leaves turn red around xmas time, IIRC. n/t |
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Bill McBlueState (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:33 AM Response to Reply #6 |
13. but the solar spectrum peaks in the green |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:20 AM Response to Original message |
3. Plants don't need heat. Heat is infrared. Photosynthesis requires ultraviolet. n/t |
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Winterblues (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:21 AM Response to Reply #3 |
4. Why is it then most plants quit growing under forty degrees? |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:22 AM Response to Reply #4 |
5. Not all plants. There are algaes that live in the ice. |
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TahitiNut (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:29 AM Response to Reply #5 |
11. Interestingly, one could observe that if chlorophyll were white then plant life could not have .. |
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csziggy (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 04:48 PM Response to Reply #5 |
40. For a recent in depth discussion of what plants might be like on other worlds under other stars |
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tridim (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:22 AM Response to Original message |
7. Most plants reflect green and absorb red yellow blue and uv |
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marketcrazy1 (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:23 AM Response to Original message |
8. did you forget EVRYTHING you learned in grade school! |
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Occam Bandage (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:25 AM Response to Reply #8 |
9. That does not answer the question, which is "why did plants not evolve |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:26 AM Response to Reply #9 |
10. Why didn't you evolve to photosynthesize? |
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TahitiNut (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:31 AM Response to Reply #10 |
12. Because I live in a cave. |
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Soylent Brice (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:34 AM Response to Reply #12 |
30. hooray for green ray frightened cave dwellers!! |
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Occam Bandage (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:34 AM Response to Reply #10 |
15. Because high oxygen levels interfere with photosynthesis, |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:41 AM Response to Reply #15 |
18. Hey, no sex threads. n/t |
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KittyWampus (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:21 AM Response to Reply #10 |
24. Wait! Who says we don't do anything else with sunlight? It affects our moods and hormones |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:29 AM Response to Reply #24 |
26. My point is that your body expends more effort defending itself from sunlight... |
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KittyWampus (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:32 AM Response to Reply #26 |
29. ah, but sweating our precious bodily fluids helps rid ourselves of toxins |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:59 AM Response to Reply #29 |
34. Why are you so intent on robbing me of my precious bodily fluids? |
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KittyWampus (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 12:01 PM Response to Reply #34 |
35. I just like arguing with you. It gets my blood up |
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Ian David (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 12:06 PM Response to Reply #35 |
36. Did you want the five-minute argument, or the course of ten? n/t |
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kimmerspixelated (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 05:05 PM Response to Reply #10 |
43. Especially true if you pour on mainstream sunscreen |
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marketcrazy1 (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:42 AM Response to Reply #9 |
20. that was not the question |
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KittyWampus (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:24 AM Response to Reply #20 |
25. the Goldilocks effect? Blue chlorophyll reflects too much and Red too little but Green is just right |
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csziggy (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 04:53 PM Response to Reply #20 |
42. See my post above about the Scientific American article |
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Tesha (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 12:28 PM Response to Reply #9 |
37. Because the various possible photochemical reactions are all tuned to particular wavelengths of... |
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Winterblues (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:34 AM Response to Reply #8 |
14. Yes that is all well and good but why green and not black or brown? |
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cbc5g (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:39 AM Response to Reply #14 |
17. Answer here |
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Richard D (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:37 AM Response to Original message |
16. Green is a whole lot prettier than black. |
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ThomWV (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:41 AM Response to Original message |
19. Green - because green is my favorite color and Jesus loves me, so its green. |
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ColbertWatcher (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 04:50 PM Response to Reply #19 |
41. Ramen. n/t |
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kimmerspixelated (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 05:07 PM Response to Reply #19 |
44. Wait a minute! |
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KittyWampus (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:44 AM Response to Original message |
21. great question! |
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soothsayer (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:51 AM Response to Original message |
22. they'd fry if they were black (maybe) |
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Warpy (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 10:58 AM Response to Original message |
23. Vegetation isn't green to absorb sunlight but to use it |
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KittyWampus (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:29 AM Response to Reply #23 |
27. you just made me think- some plants (Orchids) DO essentiall "use" the colors they reflect. |
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global1 (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:41 AM Response to Original message |
31. Because God Didn't Think Black Vegetation Would Look Good.....nt |
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hunter (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:49 AM Response to Original message |
32. The sun is green. To you it looks white because your species evolved here on earth. |
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OPERATIONMINDCRIME (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 11:51 AM Response to Original message |
33. Because It Works. The Answer Just IS That Simple. |
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Igel (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 03:10 PM Response to Original message |
38. Because absorbing all light would be expensive, |
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hunter (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 04:41 PM Response to Reply #38 |
39. I think of it this way: the plant doesn't need any more energy. |
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NutmegYankee (1000+ posts) Send PM | Profile | Ignore | Fri Apr-03-09 05:32 PM Response to Original message |
45. Ah - You see the green because they REFLECT it. |
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