Bimetal thermometer (spiral type)

How does a bimetallic strip thermometer work?

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This article provides answers to the following questions, among others: How do bimetal thermometers work?Why is the bimetal wrapped into a spiral or a helix?Why are...
Cut through a liquid filled thermometer (liquid-in-metal thermometer)

How does a liquid filled thermometer (liquid-in-metal) work?

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This article provides answers to the following questions, among others: How do a liquid-in-metal thermometers work?Why should the inner diameter of the coiled tube be kept...
Cut through a gas filled thermometer (gas-in-metal thermometer)

How does a gas filled thermometer (gas-in-metal) work?

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This article provides answers to the following questions, among others: How do gas filled thermometers work?What are the advantages of gas-in-metal thermometers compared to liquid-in-metal...
Cut through a vapour filled thermometer (vapour-in-metal thermometer)

How does a vapour pressure thermometer (vapour-in-metal) work?

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This article provides answers to the following questions, among others: How do vapor pressure thermometers work?Why do vapor pressure thermometers have a non-linear scale?
Resistance thermometer (Pt100)

How does a resistance temperature detector (resistance thermometer) work?

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This article provides answers to the following questions, among others: How do resistance thermometers work?Why should the measurement current for an RTD be as low as...
Thermocouple

How does a thermocouple work?

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This article provides answers to the following questions, among others: How does a thermocouple work?What is the Seebeck effect?What are the differences between the types of...
Infrared thermometer (Pyrometer)

How does a infrared thermometer (pyrometer) work?

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This article provides answers to the following questions, among others: How do IR thermometers (pyrometers) work?What are the advantages of pyrometers?
Thermographic image of a car

How does a thermal imaging camera work?

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This article provides answers to the following questions, among others: How do thermal imaging cameras work?Why is the thermal image displayed in false colors?
White glow of a blackbody at 6000 K

Blackbody radiation

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Blackbody radiation (cavity radiation) is the thermal radiation of a blackbody, i.e. a body that absorbs all incident radiation. Find out more about blackbody radiation in this article.
Illustration of the photon gas in a cavity acting as a blackbody

Stefan–Boltzmann law

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This article provides answers to the following questions, among others: What dows the Stefan-Boltzmann law state?What does Kirchhoff's law of thermal radiation state?Why are blackbodies ideal...
Randomly distributed velocities of the particles of a gas

Pressure and temperature

This article provides answers to the following questions, among others: What is the kinetic theory of gases?What are the assumptions on which the kinetic theory of...
Pressure distribution during compression of a gas

Equipartition theorem

This article provides answers to the following questions, among others: What statement does the equipartition theorem provide?What is a degree of freedom in the thermodynamic sense?Why...
Design of a velocity selector to determine the speed distribution in gases

Determination of the speed distribution in a gas

This article provides answers to the following questions, among others: How can the speeds of the particles in a gas be determined experimentally?What is a histogram?What...
Speed distribution of an ideal gas for different temperatures

Maxwell–Boltzmann distribution

The Maxwell-Boltzmann distribution describes the molecular speed distribution of ideal gas molecules. Find out more in this article. This article provides answers...
Balls on a vibrating plate

Derivation of the Maxwell-Boltzmann distribution function

The Maxwell-Boltzmann distribution function of the molecular speed of ideal gases can be derived from the barometric formula. This article shows the derivation.
Schematic illustration of an evaporation process

Why do liquids evaporate?

This article provides answers to the following questions, among others: How can the evaporation of liquids be explained?Why does a cooling effect occur during evaporation?Why does...
Mean free path

Mean free path & collision frequency

The mean free path is the average distance a particle travels without colliding with other particles! Learn more about the mean free path in this article!
Degrees of freedom of a molecule

Internal energy & heat capacity

This article provides answers to the following questions, among others: What is the internal energy of a gas?What are the characteristics of the thermal...