Temperature ? a term that we use daily as a matter needless to say, without being made alert to the physical correlations. But how is the term temperature defined?
Everybody perceives temperature within their environment purely subjectively. If we are too warm or too cold, it is a feeling, which may be different from person to person ? because not everyone gets cold at the same speed. The term temperature ? or, better, the problem, that influences (among other activities) our state of mind ? is discussed daily when we are discussing the expected temperature from the weather forecast with friends, acquaintances or colleagues.
Temperature
With the word temperature (from the Greek ?thermis? = warm), a specific thermal state of a body is described. Heat is really a measure of the energy of a body, that is generated by the random motion of its atoms or molecules within the body?s interior. Here, the temperature is the magnitude of a state which establishes the energy content associated with other physical quantities (mass, heat capacity).
Drowning of temperature is the Kelvin. At a temperature of 0 K, all atoms or molecules inside a body are in rest ? all motion within the body is frozen. One describes this state because the absolute zero point. The Celsius temperature scale that is more common in our latitudes defines the zero point because the freezing point of water, since this problem could possibly be reproduced without great technical effort in past times.
Temperature measurement
Different physical properties are directly dependent on the temperature and thus are used for temperature measurement, such as for example, for example:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation based on the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, with respect to the temperature
Note
Info on our temperature measuring instruments are available on the WIKA Website.