Principle of thermometer

2010-02-12 1:52 am

What are the working principles of the following thermometer?

1. infra-red thermometer
2. rotary thermometer
3. resistance thermometer
4. thermistor thermometer
5. liquid crystal thermometer

thank you

更新1:

I know for (3) and (4) it is related to thye resistance of metal, but can some1 explain it in detail? Why when the temperature is higher, the resistance of (3) will be higher? thank you

回答 (2)

[匿名]

2010-02-12 4:09 am

✔ 最佳答案

1)the infra red radition give out by hot object
2)metal expand when changes in themperature
3)resistance of metal when change in temperature
4)resistance of metal when change in temperature
5)colour change of crystal when change in temperature

參考: me

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[匿名]

2010-02-12 2:23 am

I think The thermometer was not a single invention, however, but a development. Philo and Hero of Alexandria knew of the principle that certain substances, ...
Early history - Types of thermometers- Calibration

參考: en.wikipedia.org/wiki/Thermometer -

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