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All 'old' thermometers measure temperature as a difference between the thermal expansion of two substances.
Every substance expands at a slightly different rate. Mercury, for example, expands at a large and consistent rate; while glass hardly expands at all. This makes them a very accurate combination in a thermometer (at low temperatures, -20 to 150 deg C 'ish).
Other thermometers use two strips of different metals stuck together, like a double layered cake. When heated or cooled one strip expands more than the other so the strips will curl, the amount of curl indicates how much the temperature has changed.
The best substances for 'old' thermometers have a high (fast) thermal conductivity.
Modern inferred (laser) thermometers measure the amount of heat being emitted by an object. Essentially it measures the total energy of photons being emitted by a given area. NB. the laser is just used to help aim the thermometer; it plays no part in the actual measurement.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoa thermometer measures temeperature by the Mercury inside of it going up when it is hot because the molecules speed up (as you learned in 6 or 7 grade scince) and lowers as the temperature gets cooler because the molecules get slower and closer together.
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When you measure an object's temperature you measure the?
Temperature.
What is a measure of the average energy of random motion particales of matter?
This measure is the temperature.
How do you measure temperature of a human?
Thermometer is used to measure temperature of human
Temperature is a measure of what of the particles in an object?
degrees Temperature is a measure of heat in an object.
How energy is related to heat and temperature?
Heats a measure of energy. Temperature is a measure of hotness
Why were themometers invented?
to measure temperature.
What is temperature scale of most laboratory themometers?
Celsius.
Is Jupiter's temperature ferienheight or Celsius?
When we measure Jupiter's temperature, we can describe it either way.
What is the liquid metal that is sometimes used in themometers?
Mercury.
The kelvin scale is used to measure what?
The Kelvin scale is used to measure absolute temperature, i.e., temperature from absolute zero. The way it is defined, there are no negative temperatures on the Kelvin scale.The Kelvin scale is used to measure absolute temperature, i.e., temperature from absolute zero. The way it is defined, there are no negative temperatures on the Kelvin scale.The Kelvin scale is used to measure absolute temperature, i.e., temperature from absolute zero. The way it is defined, there are no negative temperatures on the Kelvin scale.The Kelvin scale is used to measure absolute temperature, i.e., temperature from absolute zero. The way it is defined, there are no negative temperatures on the Kelvin scale.
What is the English way to measure temperature?
The English reason for measuring temperature is no different to that for any non-English person.
When you measure an object's temperature you measure the?
Temperature.
When you measure the temperature of an object you measure the?
Temperature xD
What are the two things that are found in themometers?
Meow Mix and Vacuum cleaners
How were themometers made smaller?
By using denser mercury instead of ethanol.
Why is it necessary to use a thermometer to measure temperature?
If you do not use a thermometer to measure temperature, then you have no way of knowing exactly what the temperature is, either of the air, or of the turkey you are baking, or of your refrigerator, or of your own body (if you have a fever) or of various other things for which you might have a reason to want to know the temperature.
Must temperature be measured in the shade?
The answer depends on why you want to measure the temperature and what the object is. I cannot see any way of measuring the temperature of the surface of the sun in the shade!
