Dear good people,
Recently I read an advertisement from a company selling
"water purification system". The ad claims that they
have a machine that will shine a strong UV light to tap
water, and the water comes out "cleaned from germs".
Can this be true? I thought that UV does not penetrate
well in water.
Umnarj Paeratakul
umnarj at mozart.inet.co.thumnarj at psm.swu.ac.th
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