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4hv.org :: Forums :: General Science and Electronics
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SF6 invisibility

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Marko
Thu Nov 10 2011, 09:39PM Print
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi guys

Apparently the sulfur hexafluoride gas has not only a quite high dielectric constant on standard pressure, but it also seems to increase significantly with pressure (even up to the constant of transformer oil).

One idea that sprang to me was whether it would be possible to find a transparent material that has the same exact refractive index (if not at normal pressure, then at least in elevated pressures) that could be inserted into sf6 gas and made to vanish. Perhaps yet another fun sf6 experiment apart from floating boats on it and breathing it in?

Cheers,

Marko

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Mattski
Fri Nov 11 2011, 11:15PM
Mattski Registered Member #1792 Joined: Fri Oct 31 2008, 08:12PM
Location: University of California
Posts: 527
It would need to be at elevated pressure. At atmospheric pressure it takes specialized equipment to distinguish the index of refraction of SF6 from that of air.
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