Field concept Definition and 16 Threads

The visual field is the "spatial array of visual sensations available to observation in introspectionist psychological experiments". Or simply, visual field can be defined as the entire area that can be seen when an eye is fixed straight at a point.The equivalent concept for optical instruments and image sensors is the field of view (FOV).
In optometry, ophthalmology, and neurology, a visual field test is used to determine whether the visual field is affected by diseases that cause local scotoma or a more extensive loss of vision or a reduction in sensitivity (increase in threshold).

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  1. tworitdash

    A Continuity of a quantity in a conical system to determine the velocity

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  2. nomadreid

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    It is said (hopefully no need to give references for such a common statement) that the electromagnetic field of a given charged particle is infinite in range (albeit converging to zero as the distance goes to infinity). However, given that charged particles apparently did not exist at the...
  3. B

    B What is source of fundamental particle charge?

    Hello, Analogous to mass of fundamental (not composite) particles coming from interaction of those particles with the Higg's Field, does charge of fundamental particles come from interaction of those particles with some known/hypothesized fundamental field? Thank you!
  4. V

    B Understanding the Charge Field: Effects on Particle Path and Alteration in Space

    A charged particle is passed through a beam splitter and progresses down two divergent paths. How does the charge field document this? Does the field recognize both components? Only one? And once the field is detected, defining which path was taken, does the field alter it's nature through...
  5. B

    Physics of a chemical reaction: looking for textbook recs

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  6. T

    Understanding Electric Fields and Work Done to Move Charges

    Homework Statement Hello. I am having trouble understanding this particular statement found in one of my textbooks. " Work done to move a charge along a line perpendicular to the field is zero" The Attempt at a Solution Field is a space around a charge where if we place any other charge...
  7. S

    If Faraday invented field concept, how did Newton find g?

    This is Newton's law of universal gravitation. $$F=G\frac{m_1.m_2}{r^2}$$ Gravitational field $$g$$ is derived from this formula $$g=G\frac{m_1}{r^2}$$ This is named gravitational "field" strength. If Newton knew nothing about "field concept" and formulated his formula in the form of "action...
  8. D

    Induced Electric Field Concept Question

    I am having a bit of trouble understanding something in my textbook and was wondering if you guys could help clarify. We just learned Faraday's Law that a time variant magnetic field will enduce an emf in a coil. What my textbook says is that " The electric field in the loop is NOT...
  9. T

    B and H field concept question (saturation)

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  10. TrickyDicky

    Understanding the Concept of Field in Physics: Definition and Relation to Waves

    I have been searching the web for a good explanation of the concept of field but I failed to find a good one. Could somebody provide me with a good definition of this important concept of physics? I'm specially interested in its relation with waves. Thanks.
  11. D

    Understanding Scalar Fields and the Laplace Equation: How Do They Relate?

    I've recently read about Null Identities of vector analysis. I'm having a problem in understanding what is it by "taking the curl of the grad of any scalar field is equal to zero." What is by definition of scalar field then? How would it looks like? Is position vector a scalar field? If No...
  12. P

    Electrostatic Field concept question

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  13. F

    Dipole in an Uniform Electric Field concept?

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  14. W

    Dipole (electrical) and Electric Field Concept

    Hi all, I'm kind of confused right now about some concepts. - Dipoles are essentially point charges of the same magnitude but different signs that are a certain distance away from each other, right? -In my textbook, they were calculating a charged particle that is on the dipole axis...
  15. N

    Physics cannot be based on the field concept

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  16. K

    Understanding Electric Fields and Potential in Parallel Plate Conductors

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