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Conditions of coherence in diffraction spectra produced in liquids on ultransonic standing waves
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Baer, R. |
| Organization | The National Aeronautics and Space Administration (NASA) |
| Copyright Year | 1972 |
| Abstract | EXPERIMENTS, CONDUCTED TO DETERMINE WHICH OF THE DIFFERENT DIFFRACTION SPECTRA PRODUCED ON ULTRASONIC STANDING WAVES IN LIQUIDS THROUGH THE DIFFRACTION OF LIGHT ARE COHERENT, I.E., CAN BE BROUGHT TO INTERFERE WITH EACH OTHER ARE DESCRIBED. THE RESULT INDICATES THAT ANY ARBITRARY PAIRING OF TWO SPECTRA WITH EVEN ORDINAL NUMBERS (INCLUDING ZERO ORDER) POSSESSES AT LEAST ONE COMMON COMPONENT OF COHERENT LIGHT; THE SAME IS TRUE FOR ANY PAIRING FROM THE GROUP OF SPECTRA WITH ODD ORDINAL NUMBERS. ON THE OTHER HAND, ANY SPECTRUM OF THE FIRST GROUP IS COMPLETELY INCOHERENT IN COMBINATION WITH ANY SPECTRUM OF THE SECOND GROUP. THE PATTERNS OF ULTRASONIC STANDING WAVES PRODUCED BY THE SUPERPOSITION OF SEVERAL OR ALL OF THE DIFFRACTION SPECTRA, MAY ALSO BE EXPLAINED BY SUCH COHERENCE PROPERTIES. EXPERIMENTALLY DETERMINED COHERENCE PROPERTIES ARE EXACTLY THOSE OBTAINED FROM THE ASSUMPTION THAT HIGHER DIFFRACTION SPECTRA ORIGINATE IN MULTIPLE DIFFRACTION (BRILLOUIN THEORY). |
| File Size | 5875401 |
| File Format | |
| Alternate Webpage(s) | http://www.archive.org/details/nasa_techdoc_19730002986 |
| Archival Resource Key | ark:/13960/t9h42ft7k |
| Language | English |
| Publisher Date | 1972-11-01 |
| Access Restriction | Open |
| Subject Keyword | Atmospheric Turbulence Cepheid Variables Cepheus Constellation Variable Stars Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
