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About: Introduction to gauge theory     Goto   Sponge   NotDistinct   Permalink

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Type: workyago:WikicatConceptsInPhysicsyago:Abstraction100002137yago:Cognition100023271yago:Concept105835747yago:Content105809192yago:Explanation105793000yago:HigherCognitiveProcess105770664yago:Idea105833840yago:Process105701363yago:PsychologicalFeature100023100yago:WikicatGaugeTheoriesyago:Theory105989479yago:Thinking105770926 New Facet based on Instances of this Class

A gauge theory is a type of theory in physics. The word gauge means a measurement, a thickness, an in-between distance (as in railroad tracks), or a resulting number of units per certain parameter (a number of loops in an inch of fabric or a number of lead balls in a pound of ammunition). Modern theories describe physical forces in terms of fields, e.g., the electromagnetic field, the gravitational field, and fields that describe forces between the elementary particles. A general feature of these field theories is that the fundamental fields cannot be directly measured; however, some associated quantities can be measured, such as charges, energies, and velocities. For example, say you cannot measure the diameter of a lead ball, but you can determine how many lead balls, which are equal in