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Old 01-16-2008, 12:40 PM   #33 (permalink)
ylexot (Premo)
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Quote:
Originally Posted by Gwydion View Post
And this object would indeed be invisible if it achieved a reflective index of 0, asno light would be able to reflect off of it and into our eyes.

So, now the question is if an object HAD a reflective index of 0 and you DID look at it....what would you see in place of the object?
It would not be invisible. It would be black. Reflected light reaching our eyes does not determine visibility/invisibility. It determines color and intensity. Reflectivity of zero would mean an intensity of zero. For something to be invisible, visible light would have to pass through it. For example, air is pretty close to invisible, but do you consider the air to be black?
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