Does radioactivity glow green?
by 
keithold thanks all baggers
ANSWERS: 6
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Not necessarily, I believe it to be more of a flourescent yellow, I think... :-)
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Radioactivity is invisible. There are fluorescent materials that might emit green (or other color) light in response to being hit by an energetic particle. The water in nuclear reactors is said to emit a blue glow due to so-called Cerenkov radiation, where high-energy particles are moving so close to the speed of light in a vacuum that they exceed the speed of light in water, which is a little slower!
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Only if it's kryptonite.
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No, it's invisable. Frozen radon gas glows orange.
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Only on The Simpsons! A certain type of radioactive decay can release very high frequency "light" called gamma rays, but they are far outside the range of human vision.
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No. Radioactivity itself is invisible. Some forms of radioactive decay release energy in the form of blue/green light as well as the alphas, betas or gammas. It is this light which was seen before the invisible particles we now call radioactivity and pointed out that something odd was going on. This means that people associated the two. But is is far from generally true that radiation releases such light.
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