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by england on December 4th, 2006

england

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Why and how is a lemon yellow

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  • by IdeaSniper on December 8th, 2006

    IdeaSniper

    This is not only a question of science, but a question of metaphysics. The lemon is yellow because of the wavelength of light it reflects. But that is only partially true. How we see color is not fully understood and a number of contrasting theories exist. We perceive color based on the way our mind has learned to interpret the signals from our eyes. The surrounding colors affect our perception of color and the ambient light affects our perception, too. Sometimes we can see colors that "aren't there" because of the way we interpret the signal; that is, we might interpret a color as yellow when the actual wavelength of light at which we are looking is one we would usually call grey. Check out this site and select "Color perception" for a striking color illusion:http://www.echalk.co.uk/amusements/OpticalIllusions/illusions.htm
    The designer of the illusion is R. Beau Lotto whose book "Why We See What We Do: An Empirical Theory of Vision" explains his studies and theories of color perception. The book: http://www.sinauer.com/detail.php?id=7528

    Ultimatley, human experience is outside the realm of science since the scientific method can never prove to anyone else that you taste a bitter flavor, feel heat, or are seeing the color you claim.

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