What was the main purpose of Rømer's thermometer?
Measure humidity
Predict weather
Show temperature between two points
Calculate altitude
Answer
Show temperature between two points. Rømer's thermometer was designed to measure temperature differences, rather than absolute temperatures. It consisted of a glass tube filled with alcohol, with a bulb at one end and a scale marked on the tube. The alcohol expanded and contracted with changes in temperature, causing the level of the liquid in the tube to rise or fall.
Stargazing Through Time: The Ole Rømer Astronomical Challenge
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