Galileo thermometer

Uploaded 21 Dec 2012 — 1 favorite
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© Vin Weathermon
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Photo Info
UploadedDecember 21, 2012
TakenDecember 21, 2012
MakeCanon
ModelCanon EOS 5D Mark II
Exposure1/160 sec at f/5.6
FlashNo Flash
Focal Length100 mm
ISO125
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I used to sit and stare at these beautiful glass orbs when I was a kid.

A Galileo thermometer (or Galilean thermometer) is a thermometer made of a sealed glass cylinder containing a clear liquid and several glass vessels of varying densities. As temperature changes, the individual floats rise or fall proportion to their respective density.

It is named after Galileo Galilei because he discovered the principle on which this thermometer is based—that the density of a liquid changes in proportion to its temperature—and invented a thermoscope based on this principle.

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