If sound is passed through a particle at 0K , that is, a body of infinite density, so in that what will be the speed of light?
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What happens at absolute zero?
SPACE 17 February 2010
By Hazel Muir

The Boomerang Nebula is the coldest natural object known in the universe, seen here by the Hubble Space Telescope
(Image: ESA/NASA)
The curious things that happen at low temperatures keep on throwing up surprises. Last week, scientists reported that molecules in an ultra-cold gas can chemically react at distances up to 100 times greater than they can at room temperature.
In experiments closer to room temperature, chemical reactions tend to slow down as the temperature decreases. But scientists found that molecules at frigid temperatures just a few hundred billionths of a degree above absolute zero (−273.15°C or 0 kelvin) can still exchange atoms, forging new chemical bonds in the process, thanks to weird quantum effects that extend their
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