Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

$Interference and Diffraction$ 02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...

X-ray Crystallography

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

Interaction of EM Radiation with Matter: Spectroscopy

Interaction of EM Radiation with Matter: Spectroscopy

Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...

Determination of Crystal Structures

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...

You might also read

Related Articles

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

Sort by

Same author

[Physiotherapeutic methods in ophthalmic rehabilitation of patients with glaucoma and cataract].

Voprosy kurortologii, fizioterapii, i lechebnoi fizicheskoi kultury·2022

Same author

Photothermoplastic recording media and its application in the holographic method of determination of the refractive index of liquid objects.

Applied optics·2018

Same author

Antioxidant and Antimutagenic Metabolites in Animals with Opposite Sensitivity to Tuberculosis Mycobacteria and Mutagenic Xenobiotics.

Bulletin of experimental biology and medicine·2016

Same author

Some features of information properties of holographic recording media based on a photoconducting carbazolyl-containing oligomer doped with an organic electron acceptor.

Applied optics·2016

Same author

Information media based on electron donor oligomers with different structures.

Applied optics·2014

Same author

Central cholinergic activation of a vagus nerve-to-spleen circuit alleviates experimental colitis.

Mucosal immunology·2013

Search research articles

Related Experiment Video

Updated: Jul 7, 2026

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

Location of the effective diffusing-photon source in a strongly scattering medium.

A F Kostko, V A Pavlov

|February 12, 2008

Summary

This summary is machine-generated.

Researchers found that the effective light source in scattering media is unexpectedly deep, at 4.6 transport mean free paths. This finding impacts diffusing-photon correlation spectroscopy calculations.

More Related Videos

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels

Published on: September 8, 2016

Related Experiment Videos

Last Updated: Jul 7, 2026

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

Published on: January 9, 2017

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels

Published on: September 8, 2016

Area of Science:

Optics and photonics
Biophysics
Materials science

Background:

Light scattering in turbid media creates an effective photon source within the material.
Understanding this source's position is crucial for accurate optical measurements.
Standard diffusion theory predicts a source depth of one transport mean free path.

Purpose of the Study:

To accurately determine the effective source site depth (penetration depth) in a strongly scattering medium.
To investigate deviations from standard diffusion theory predictions.
To assess the impact of source depth on diffusing-photon correlation spectroscopy.

Main Methods:

Illuminating a turbid spherical sample with a narrow laser beam.
Measuring the diffusive intensity of light emerging from the sample.
Calculating the effective source penetration depth relative to the known sample diameter.

Main Results:

The effective photon source was found to be significantly deeper than predicted, at 4.6 (±0.7) transport mean free paths (l*).
This observed depth deviates substantially from the standard diffusion theory prediction of 1 l*.
The determined penetration depth provides critical information for optical models.

Conclusions:

The effective photon source in strongly scattering media is unexpectedly deep.
This deep source position necessitates adjustments in diffusion theory applications.
Accurate knowledge of penetration depth is vital for diffusing-photon correlation spectroscopy and other optical techniques.