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| Mario:
--- Quote from: timoe on March 25, 2006, 09:56:59 am ---I was just trying this out as an FYI for all those people who might think a red ball + a blue light = purple. not so. :( --- End quote --- The red (orange) ball is acting as a filter, only letting red/orange light through. No matter what color LED you use, the ball will only allow the red/orange light through. The blue LED must not be pure blue if you still see an orange glow. If it was pure blue, I would have expected the glow to be very dim. Mario |
| JoyMonkey:
I've got a Happ translucent red trackball too. When I first got it I thought there'd been a mistake because it looks really orange when un-lit, but put a light behind it and it glows deep red. Having the leds fade in/out or sawtooth looks really cool because the ball looks like it cycles between orange and red, all firely like! |
| Timstuff:
--- Quote from: timoe on March 25, 2006, 02:35:34 am ---This did not come out as expected. It still looks pretty red. This is with a 12v super bright blue led cluster. --- End quote --- Well, I can offer you a pretty straight up explanation as to why it would still look red. The reason why something like a translucent red object appears the color it does is because it filters out all the light except for the red light before it reaches your eye. So naturally, if you try to put a blue light behind it, the blue light will not be able to pass through. End science lesson. ;D |
| Sizzler:
--- Quote from: Timstuff on March 25, 2006, 03:14:30 pm ---The reason why something like a translucent red object appears the color it does is because it filters out all the light except for the red light before it reaches your eye. So naturally, if you try to put a blue light behind it, the blue light will not be able to pass through. End science lesson. ;D --- End quote --- Thanks for teaching us that lesson, but I think we got it the first two times people explained it. --- Quote from: Level42 on March 25, 2006, 03:35:23 am ---the ball is very good in filtering all other colors but red. --- End quote --- --- Quote from: Mario on March 25, 2006, 11:11:27 am ---The red (orange) ball is acting as a filter, only letting red/orange light through. No matter what color LED you use, the ball will only allow the red/orange light through. --- End quote --- |
| Mark70:
Hmmm. There must be a way to filter colours. You can create colours additively with something like overhead projector transluscent films and transluscent inks. So why isn't there a way to see the red trackball as purple. I'm just supporting the initial inference and having some validity. It is by proof false, but I wouldn't berate you for thinking it to begin with. Something tells me though that in order to see your red trackball as purple, you would have to do something that's not practical for using a trackball, like look at it through a blue photography filter; which is just kind of silly for gaming, but my be the kind of logic that lead you to believe that a blue light source would produce purple. Any optical physicists out there? |
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