Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Calculation of Electric Flux01:25

Calculation of Electric Flux

Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
Magnetic Flux01:18

Magnetic Flux

The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
Gauss's Law: Spherical Symmetry01:26

Gauss's Law: Spherical Symmetry

A charge distribution has spherical symmetry if the density of charge depends only on the distance from a point in space and not on the direction. In other words, if the system is rotated, it doesn't look different. For instance, if a sphere of radius R is uniformly charged with charge density ρ0, then the distribution has spherical symmetry. On the other hand, if a sphere of radius R is charged so that the top half of the sphere has a uniform charge density ρ1 and the bottom half has a uniform...
Electric Field of a Non Uniformly Charged Sphere01:22

Electric Field of a Non Uniformly Charged Sphere

Gauss's law states that the electric flux through any closed surface equals the net charge enclosed within the surface. This law is beneficial for determining the expressions for the electric field for a particular charge distribution if the electric flux is known.
Consider a non-uniformly charged sphere, for which the density of charge depends only on the distance from a point in space and not on the direction. Such a sphere has a spherically symmetrical charge distribution. Here, the electric...
Application of Integration: Problem Solving01:30

Application of Integration: Problem Solving

The process of breathing involves the periodic intake and expulsion of air, known as the respiratory cycle, which typically lasts about five seconds. Modeling the volume of air inhaled into the lungs as a function of time provides insight into both the dynamics and efficiency of pulmonary ventilation. This volume is determined by integrating the airflow rate over time, which captures the cumulative effect of air entering the lungs.Sinusoidal Model of AirflowAirflow during respiration is not...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Butyrate enhances interleukin (IL)-8 secretion by intestinal epithelial cells in response to IL-1beta and lipopolysaccharide.

Pediatric research·1998
Same author

Effects on fetal growth of repeated blood collection for toxicokinetics from pregnant rats.

The Journal of toxicological sciences·1998
Same author

Clinical role of soluble adhesion molecules during immunotherapy for perennial allergic rhinitis.

Archives of otolaryngology--head & neck surgery·1998
Same author

Transcranial assessment of maternal cerebral blood flow velocity in patients with pre-eclampsia.

Acta obstetricia et gynecologica Scandinavica·1998
Same author

[Development of index of social activities for the elderly].

[Nihon koshu eisei zasshi] Japanese journal of public health·1998
Same author

pH dependence of facilitation by neurotransmitters and divalent cations of P2X2 purinoceptor/channels.

European journal of pharmacology·1998

Related Experiment Video

Updated: Jun 8, 2026

Lens-free Video Microscopy for the Dynamic and Quantitative Analysis of Adherent Cell Culture
09:04

Lens-free Video Microscopy for the Dynamic and Quantitative Analysis of Adherent Cell Culture

Published on: February 23, 2018

Integrating sphere simulation: application to total flux scale realization.

Y Ohno

    Applied Optics
    |October 2, 2010
    PubMed
    Summary

    This study proposes a new method using an integrating sphere to accurately calibrate the total luminous flux of light sources. Computer simulations show a specific model achieves sufficient accuracy for lamp calibration.

    Area of Science:

    • Photometry
    • Optical Engineering
    • Metrology

    Background:

    • Accurate calibration of total luminous flux is essential for light source characterization.
    • Existing methods may have limitations in precision and scope.

    Purpose of the Study:

    • To develop and validate a novel method for determining the total luminous flux scale.
    • To assess the feasibility of using an integrating sphere with an external flux standard for calibration.

    Main Methods:

    • Utilized an integrating sphere with an external port for introducing calibrated flux.
    • Performed computer simulations on various integrating sphere models.
    • Analyzed the impact of sphere geometry, baffles, internal sources, and wall reflectance.

    More Related Videos

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
    08:49

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

    Published on: February 17, 2019

    Related Experiment Videos

    Last Updated: Jun 8, 2026

    Lens-free Video Microscopy for the Dynamic and Quantitative Analysis of Adherent Cell Culture
    09:04

    Lens-free Video Microscopy for the Dynamic and Quantitative Analysis of Adherent Cell Culture

    Published on: February 23, 2018

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
    08:49

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

    Published on: February 17, 2019

    Main Results:

    • Simulations evaluated the comparison between internal test lamps and external flux standards.
    • Identified optimal configurations for integrating sphere design and operation.
    • One simulated model demonstrated high potential for accurate total flux calibration.

    Conclusions:

    • The proposed method offers a viable approach for establishing a total luminous flux scale.
    • The validated integrating sphere model is suitable for calibrating lamps for total flux.
    • This technique enhances the accuracy and reliability of photometric measurements.