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Updated November 15, 2022
  Notion of field in physics

Image: a field is a delimited portion of space in which a measurable physical quantity interacts. The electric charge interacts with the electromagnetic field represented by the curved lines around a magnet.

Gradient in physics

Image: notion of gradients. The gradients are the blue arrows that indicate where the function grows the most in the field (white = low value, black = high value).
credit: By see file history — Own work, CC BY-SA 2.5

 
           
           
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