A Conversation for How a Laser Works
Big Geordie Started conversation Sep 23, 2001
Dr Hell Posted Sep 24, 2001
Uh.. You mean that light effect seen in many party halls? Where white stuff starts glowing?
Weird, isn't it?
It's UV-Radiation, well or at least deep blue radiation. Humans cannot detect this kind of light with the eyes very well, so therefore we don't SEE the light very well. That's why we call it 'black' light.
Many objects are stained with dyes to make them appear in the colour they should appear under normal illumination (for example the white letters on a black t-shirt). These dyes start shining brighter when they are exposed to UV radiation (technically one speaks of fluorescence), and therefore one has the impression that some colours are glowing.
At least I think this was the explanation.
Big Geordie Posted Sep 25, 2001
Dr Hell Posted Sep 26, 2001
If the system would be very (very) heavy yes. Otherwise no.
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