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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Resonance02:52

Resonance

The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

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Related Experiment Video

Updated: Jun 11, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Resonance structures in elastic and Raman scattering from microspheres.

C K Chan, R C Flagan, J H Seinfeld

    Applied Optics
    |June 29, 2010
    PubMed
    Summary

    This study reveals resonance structures in evaporating sodium nitrate droplets, linking Mie scattering and Raman emissions. This finding aids in determining the chemical composition of spherical particles.

    Area of Science:

    • Optical Physics
    • Aerosol Science
    • Spectroscopy

    Background:

    • Mie scattering and Raman emissions are fundamental optical phenomena in spherical particles.
    • Understanding their interactions is crucial for particle characterization.
    • Evaporating droplets present dynamic systems where these interactions can be studied.

    Purpose of the Study:

    • To investigate the interplay between Mie scattering and Raman emissions in an evaporating aqueous sodium nitrate droplet.
    • To observe and analyze resonance structures in scattered light and Raman signals.
    • To explore the potential for chemical composition determination of spherical particles using these optical measurements.

    Main Methods:

    • Measurement of Raman spectra and elastically scattered light from an evaporating droplet.

    More Related Videos

    Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
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    Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

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    Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
    08:06

    Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

    Published on: June 2, 2017

    Related Experiment Videos

    Last Updated: Jun 11, 2026

    Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
    12:21

    Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

    Published on: April 4, 2016

    Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
    07:44

    Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

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    Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
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    Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

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  • Temporal profiling of scattered light and Raman emissions (nitrate and water).
  • Application of a microsphere inelastic scattering model and analysis of Mie resonance behavior.

    • Main Results:

    • Observed resonance structures in the temporal profiles of elastically scattered light and Raman emissions from water and nitrate.
    • Concerted and independent occurrences of these resonance structures were noted.
    • The experimental data were explained using established models of light scattering by microspheres.

    Conclusions:

    • The study demonstrates a correlation between Mie scattering and Raman emissions in evaporating droplets.
    • Resonance phenomena provide insights into the complex optical behavior of these particles.
    • The observed optical signatures can be utilized for the chemical analysis of spherical particles.