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  2. Physical quantity

    In physics, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time.
    en.wikipedia.org/wiki/Field_(physics)
    en.wikipedia.org/wiki/Field_(physics)
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    What is a field in physics?Illustration of the electric field surrounding a positive (red) and a negative (blue) charge. In physics, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time.
    What is an example of a field in physics?In physics the classic example of a field is the electromagnetic field. What happens there is that we find that some types of object experience a force when we put them somewhere, and the force varies in a smooth way as we move them around.
    What is electric field in physics?electric field, an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E, called electric field strength or electric field intensity or simply the electric field.
    Why are fields important in physics?Fields are important in both classical and quantum physics. At first it was thought they are just some imaginary mapping of the forces of gravitation or electric and magnetic forces. Gradually it became clear one can not keep it away from physics. They are more than imagination. Why?
     
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    In physics, a field is a physical quantity, represented by a scalar, vector, or tensor, that has a value for each point in space and time. For example, on a weather map, the surface temperature is described by assigning a number to each point on the map; the temperature can be considered at a certain … See more

    To Isaac Newton, his law of universal gravitation simply expressed the gravitational force that acted between any pair of massive … See more

    There are several examples of classical fields. Classical field theories remain useful wherever quantum properties do not arise, and can be … See more

    Field theory usually refers to a construction of the dynamics of a field, i.e., a specification of how a field changes with time or with respect to other independent physical variables on which the field depends. Usually this is done by writing a Lagrangian See more

    Classical fields image
    Overview image
    Quantum fields image

    It is now believed that quantum mechanics should underlie all physical phenomena, so that a classical field theory should, at least in principle, … See more

    • "Fields". Principles of Physical Science. Vol. 25 (15th ed.). 1994. p. 815 – via Encyclopædia Britannica (Macropaedia).
    Landau, Lev D. and Lifshitz, Evgeny M. (1971). Classical … See more

     
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  5. WebFeb 10, 2023 · A field is a concept that is used in almost every part of physics. In Physics 7C we will concentrate on the electric and magnetic fields. The concept of fields will help us understand how electric charges …

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