Dealing with Dogma
5 Live Science Podcast
00:00
Is There Enough Energy in That Light to Make This Work?
Tetanium dioxide particles are added to the glass of plastic bags. They react with ambient light to produce nasties that blits dirt. At king's cross station, sunlight shines on the glass so they can do this. But is there enough energy in artificial light to make it work? The answer is 'yes'
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