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    What causes the green penumbra in this picture?

    QA It's not green, it's cyan the opposite of red. It's cyan not green, cyan is the opposite of red. Magenta is the opposite of green. Shadows tend to take on an opposite hue.
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    What decides the colour of light?

    That's not so unfortunate, it would be yellow's dark without the black (that's the way computers work, subtract light to make a darker color). If you want a lighter color just add it's opposite color, blue light. I'm a little curious as to just how dark of a yellow pure spectral yellow from a...
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    What decides the colour of light?

    Me too, I've got to get this physics down. This topic was up my ally, it's not a street yet, so this is what I started with. Science Advisor said a spectrometer could tell the difference between making yellow from two lights, red and green, and the spectrum pigment color. That being said, I...
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    Spectrum of light

    Hi Vanesh, Ok, I think I have it. The higher frequency has more energy and momentum of protons. More of a lower frequency with a longer wavelength uses less energy and would have the same momentum. A lot of Alfa waves can move matter more easily then the same amount of energy used in...
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    Spectrum of light

    Hi Doc Al, thank you, I understand what you have said. I understand that reflection receives twice the pressure then absorption. "Maybe magenta and Ultraviolet can move an object with less energy required then visible light" That clear glass will filter out UV rays so this test is not...
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    Spectrum of light

    H Gnosis, Thank you. Perhaps I'm on the wrong tract. I know light's pressure can be measured, that's what got me started, but I might be looking at the wrong part of the spectrum. Maybe the invisible magenta and Ultraviolet wavelengths can move an object with less energy required then the...
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    Spectrum of light

    Hi dylanesque, Oh, that was good, thanks. What would be your thought on the most pressure giving wave in the EM field?
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    Spectrum of light

    Thank you Gnosis, you are very clear in your explanation. The hight and depth of one wave changes by frequency but not the speed at which it travels. If a light emerges from a single point scattering 360 degrees x 360 degrees in all directions is it diminished by the distance between each...
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    Spectrum of light

    Thank you Gnosis/barooonscape. You told me a lot. That most EM spectrums are backward, red should be on the left because it has the lower 400,000,000 MHz and indigo the higher at 700,000,000 MHz (waves per second). The longer wavelength, lower frequency regions are located on the far left of...
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