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

Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Modes of Standing Waves: II01:04

Modes of Standing Waves: II

The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end.
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Traveling Waves: Lossless Lines01:27

Traveling Waves: Lossless Lines

The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx and a shunt capacitance CΔx.
Graphing the Wave Function01:13

Graphing the Wave Function

Consider the wave equation for a sinusoidal wave moving in the positive x-direction. The wave equation is a function of both position and time. From the wave equation, two different graphs can be plotted.

You might also read

Related Articles

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

Sort by
Same author

Regulation and immunolocalization of acyl-coenzyme A: cholesterol acyltransferase in mammalian cells as studied with specific antibodies.

The Journal of biological chemistry·1995
Same author

Regulation of platelet activation in vitro by the c-Mpl ligand, thrombopoietin.

Blood·1995
Same author

Operator-less processing of myocardial perfusion SPECT studies.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine·1995
Same author

Regulation of delta FosB and FosB-like proteins by electroconvulsive seizure and cocaine treatments.

Molecular pharmacology·1995
Same author

T cells, but not B cells, are required for bowel inflammation in interleukin 2-deficient mice.

The Journal of experimental medicine·1995
Same author

Regulation of cytochrome P450 2C11 (CYP2C11) gene expression by interleukin-1, sphingomyelin hydrolysis, and ceramides in rat hepatocytes.

The Journal of biological chemistry·1995

Related Experiment Video

Updated: Jun 8, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Planar waveguide refractive index distribution functions determined precisely from mode indices.

X Mu, X Yue, J Chen

    Applied Optics
    |October 2, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study extends the inverse WKB approximation to accurately determine waveguide index profiles from measured mode indices. The enhanced method provides more precise waveguide parameters than previous techniques.

    More Related Videos

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

    Published on: August 30, 2012

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy
    08:01

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy

    Published on: May 12, 2020

    Related Experiment Videos

    Last Updated: Jun 8, 2026

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
    11:08

    Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

    Published on: November 30, 2012

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

    Published on: August 30, 2012

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy
    08:01

    Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy

    Published on: May 12, 2020

    Area of Science:

    • Optics
    • Materials Science
    • Waveguide Technology

    Background:

    • Accurate determination of refractive index profiles is crucial for waveguide design and performance.
    • Existing methods like the original inverse WKB approximation have limitations in precision.

    Purpose of the Study:

    • To extend the inverse WKB approximation for accurate derivation of index distribution functions.
    • To compare the derived functions with standard distributions (exponential, Fermi).
    • To validate the technique for practical applications, such as proton-exchanged lithium tantalate waveguides.

    Main Methods:

    • Extended inverse WKB (IWKB) approximation applied to measured mode indices.
    • Development of a criterion for accurate function derivation.
    • Comparison with exponential and Fermi distribution models.

    Main Results:

    • The extended IWKB approximation accurately retrieves index distribution functions.
    • Improved accuracy in determining waveguide index profile, surface index, and depth.
    • Precise index distribution function derived for a c-cut proton-exchanged LiTaO(3) waveguide.

    Conclusions:

    • The extended IWKB approximation offers a more accurate method for waveguide characterization.
    • The technique successfully models complex index profiles in practical devices.
    • Calculated mode indices show excellent agreement with experimental data (within 10^-4).