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Related Concept Videos

Interference and Diffraction02:18

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: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...
IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
Interference and Superposition of Waves01:07

Interference and Superposition of Waves

When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...

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Related Experiment Video

Updated: Jun 7, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

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Published on: October 11, 2016

Technique for obtaining visibility amplitudes from atmospherically disturbed interferograms.

J A Benson, H M Dyck, R R Howell

    Applied Optics
    |October 22, 2010
    PubMed
    Summary

    We developed general data-reduction techniques for stellar interferograms. These methods yield accurate angular diameter and effective temperature measurements for stars like Betelgeuse.

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    Area of Science:

    • Astronomy and Astrophysics
    • Optical Interferometry

    Background:

    • Stellar interferometry provides high-resolution measurements of celestial objects.
    • Raw interferogram data require sophisticated processing for accurate analysis.

    Purpose of the Study:

    • To present general data-reduction techniques for stellar interferograms.
    • To enable accurate visibility data extraction from raw interferometric measurements.

    Main Methods:

    • Development of general data-reduction techniques applicable to stellar interferograms.
    • Application of these techniques to raw Earth-scanned interferograms from an infrared Michelson array stellar interferometer.

    Main Results:

    • Successful extraction of fundamental visibility data.
    • Obtained new direct angular diameter measurements for α Her, α Ori, and Mira.
    • Determined effective temperatures for these stars.

    Conclusions:

    • The described data-reduction techniques are universally applicable to various stellar interferometers.
    • These methods facilitate precise astrophysical measurements from interferometric data.