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Night vision cameras

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meglet | 15:14 Fri 12th Jan 2007 | Science
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While watching Big Brother the other day I noticed when they switch to the night vision cameras some people's dark hair was shown as white and some people's stayed dark. I was wondering what might cause this.
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Some hair dyes fluoresce.
00:06 Tue 16th Jan 2007

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Night vision cameras

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