General Article


, Volume 4, Issue 6, pp 15-19

First online:

Second sound

2. The role of elastic waves
  • R. SrinivasanAffiliated withRaman Research Institute, C V Raman Avenue Sadashivanagar

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In Part 11 we describe the propagation of temperature and entropy as waves superfluids emphasizing the experimental demonstration of their existence. Here we dwell upon a microscopic view of these waves and point out that they can exist even in crystals at low temperatures.