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Light through a Sound Wave


Why does the index of refraction change the direction of light?How far do air particles move when a sound wave passes through them?Intensity of Sound WaveWhat exactly are light waves?Does the speed of light have a range of speeds due to medium-dependency?How can muons travel faster than light through ice?Why doesn't a medium travel along with the wave propagating through it?What prevents sound to be just wind?If light is electromagnetic wave why magnetic compass work in presence of light?Does Snell's Law have real life applications?













3












$begingroup$


We know that the speed of light depends on the density of the medium it is travelling through. It travels faster through mediums of less density and vice versa.



Now, when we produce sound in a medium, a series of rarefactions and compressions are created in the medium by the vibration of the source of sound.



Compressions have high pressure and high density, while rarefactions have low pressure and low density.



If light is made to propagate through such a disturbance in the medium, does it experience refraction due to changes in the density of the medium? Why don't we observe this?










share|cite|improve this question









$endgroup$











  • $begingroup$
    An effect like this is used in acousto-optic modulators.
    $endgroup$
    – Emil
    57 mins ago















3












$begingroup$


We know that the speed of light depends on the density of the medium it is travelling through. It travels faster through mediums of less density and vice versa.



Now, when we produce sound in a medium, a series of rarefactions and compressions are created in the medium by the vibration of the source of sound.



Compressions have high pressure and high density, while rarefactions have low pressure and low density.



If light is made to propagate through such a disturbance in the medium, does it experience refraction due to changes in the density of the medium? Why don't we observe this?










share|cite|improve this question









$endgroup$











  • $begingroup$
    An effect like this is used in acousto-optic modulators.
    $endgroup$
    – Emil
    57 mins ago













3












3








3


2



$begingroup$


We know that the speed of light depends on the density of the medium it is travelling through. It travels faster through mediums of less density and vice versa.



Now, when we produce sound in a medium, a series of rarefactions and compressions are created in the medium by the vibration of the source of sound.



Compressions have high pressure and high density, while rarefactions have low pressure and low density.



If light is made to propagate through such a disturbance in the medium, does it experience refraction due to changes in the density of the medium? Why don't we observe this?










share|cite|improve this question









$endgroup$




We know that the speed of light depends on the density of the medium it is travelling through. It travels faster through mediums of less density and vice versa.



Now, when we produce sound in a medium, a series of rarefactions and compressions are created in the medium by the vibration of the source of sound.



Compressions have high pressure and high density, while rarefactions have low pressure and low density.



If light is made to propagate through such a disturbance in the medium, does it experience refraction due to changes in the density of the medium? Why don't we observe this?







visible-light speed-of-light acoustics refraction






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked 6 hours ago









Mrigank PawagiMrigank Pawagi

492139




492139











  • $begingroup$
    An effect like this is used in acousto-optic modulators.
    $endgroup$
    – Emil
    57 mins ago
















  • $begingroup$
    An effect like this is used in acousto-optic modulators.
    $endgroup$
    – Emil
    57 mins ago















$begingroup$
An effect like this is used in acousto-optic modulators.
$endgroup$
– Emil
57 mins ago




$begingroup$
An effect like this is used in acousto-optic modulators.
$endgroup$
– Emil
57 mins ago










2 Answers
2






active

oldest

votes


















6












$begingroup$

Actually this effect has been observed with light diffracted by ultra-sound waves.
In order to get observable effects you need ultra-sound
with wavelengths in the μm range (i.e. not much longer than light waves),
and thus sound frequencies in the MHz range.



See for example here:




  • On the Scattering of Light by Supersonic Waves

    by Debye and Sears in 1932



    enter image description here




  • The diffraction of light by high frequency sound waves: Part I

    by Raman and Nagendra Nathe in 1935


    A theory of the phenomenon of the diffraction of light by sound-waves of high frequency in a medium, discovered by Debye and Sears and Lucas and Biquard, is developed.








share|cite|improve this answer











$endgroup$




















    0












    $begingroup$

    I have seen it with standing waves in water, a PhyWe demonstration experiment. The frequency 800 kHz, which gives a distance between nodes of about a millimeter. The standing wave is in a cuvette, between the head of a piezo hydrophone transducer and the bottom. When looking through the water, one sees the varying index of refraction as a "wavyness" of the background.



    I could not find a description of this online, but I found this about demonstration experiments in air: https://docplayer.org/52348266-Unsichtbares-sichtbar-machen-schallwellenfronten-im-bild.html






    share|cite|improve this answer











    $endgroup$












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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      6












      $begingroup$

      Actually this effect has been observed with light diffracted by ultra-sound waves.
      In order to get observable effects you need ultra-sound
      with wavelengths in the μm range (i.e. not much longer than light waves),
      and thus sound frequencies in the MHz range.



      See for example here:




      • On the Scattering of Light by Supersonic Waves

        by Debye and Sears in 1932



        enter image description here




      • The diffraction of light by high frequency sound waves: Part I

        by Raman and Nagendra Nathe in 1935


        A theory of the phenomenon of the diffraction of light by sound-waves of high frequency in a medium, discovered by Debye and Sears and Lucas and Biquard, is developed.








      share|cite|improve this answer











      $endgroup$

















        6












        $begingroup$

        Actually this effect has been observed with light diffracted by ultra-sound waves.
        In order to get observable effects you need ultra-sound
        with wavelengths in the μm range (i.e. not much longer than light waves),
        and thus sound frequencies in the MHz range.



        See for example here:




        • On the Scattering of Light by Supersonic Waves

          by Debye and Sears in 1932



          enter image description here




        • The diffraction of light by high frequency sound waves: Part I

          by Raman and Nagendra Nathe in 1935


          A theory of the phenomenon of the diffraction of light by sound-waves of high frequency in a medium, discovered by Debye and Sears and Lucas and Biquard, is developed.








        share|cite|improve this answer











        $endgroup$















          6












          6








          6





          $begingroup$

          Actually this effect has been observed with light diffracted by ultra-sound waves.
          In order to get observable effects you need ultra-sound
          with wavelengths in the μm range (i.e. not much longer than light waves),
          and thus sound frequencies in the MHz range.



          See for example here:




          • On the Scattering of Light by Supersonic Waves

            by Debye and Sears in 1932



            enter image description here




          • The diffraction of light by high frequency sound waves: Part I

            by Raman and Nagendra Nathe in 1935


            A theory of the phenomenon of the diffraction of light by sound-waves of high frequency in a medium, discovered by Debye and Sears and Lucas and Biquard, is developed.








          share|cite|improve this answer











          $endgroup$



          Actually this effect has been observed with light diffracted by ultra-sound waves.
          In order to get observable effects you need ultra-sound
          with wavelengths in the μm range (i.e. not much longer than light waves),
          and thus sound frequencies in the MHz range.



          See for example here:




          • On the Scattering of Light by Supersonic Waves

            by Debye and Sears in 1932



            enter image description here




          • The diffraction of light by high frequency sound waves: Part I

            by Raman and Nagendra Nathe in 1935


            A theory of the phenomenon of the diffraction of light by sound-waves of high frequency in a medium, discovered by Debye and Sears and Lucas and Biquard, is developed.









          share|cite|improve this answer














          share|cite|improve this answer



          share|cite|improve this answer








          edited 5 hours ago

























          answered 6 hours ago









          Thomas FritschThomas Fritsch

          920212




          920212





















              0












              $begingroup$

              I have seen it with standing waves in water, a PhyWe demonstration experiment. The frequency 800 kHz, which gives a distance between nodes of about a millimeter. The standing wave is in a cuvette, between the head of a piezo hydrophone transducer and the bottom. When looking through the water, one sees the varying index of refraction as a "wavyness" of the background.



              I could not find a description of this online, but I found this about demonstration experiments in air: https://docplayer.org/52348266-Unsichtbares-sichtbar-machen-schallwellenfronten-im-bild.html






              share|cite|improve this answer











              $endgroup$

















                0












                $begingroup$

                I have seen it with standing waves in water, a PhyWe demonstration experiment. The frequency 800 kHz, which gives a distance between nodes of about a millimeter. The standing wave is in a cuvette, between the head of a piezo hydrophone transducer and the bottom. When looking through the water, one sees the varying index of refraction as a "wavyness" of the background.



                I could not find a description of this online, but I found this about demonstration experiments in air: https://docplayer.org/52348266-Unsichtbares-sichtbar-machen-schallwellenfronten-im-bild.html






                share|cite|improve this answer











                $endgroup$















                  0












                  0








                  0





                  $begingroup$

                  I have seen it with standing waves in water, a PhyWe demonstration experiment. The frequency 800 kHz, which gives a distance between nodes of about a millimeter. The standing wave is in a cuvette, between the head of a piezo hydrophone transducer and the bottom. When looking through the water, one sees the varying index of refraction as a "wavyness" of the background.



                  I could not find a description of this online, but I found this about demonstration experiments in air: https://docplayer.org/52348266-Unsichtbares-sichtbar-machen-schallwellenfronten-im-bild.html






                  share|cite|improve this answer











                  $endgroup$



                  I have seen it with standing waves in water, a PhyWe demonstration experiment. The frequency 800 kHz, which gives a distance between nodes of about a millimeter. The standing wave is in a cuvette, between the head of a piezo hydrophone transducer and the bottom. When looking through the water, one sees the varying index of refraction as a "wavyness" of the background.



                  I could not find a description of this online, but I found this about demonstration experiments in air: https://docplayer.org/52348266-Unsichtbares-sichtbar-machen-schallwellenfronten-im-bild.html







                  share|cite|improve this answer














                  share|cite|improve this answer



                  share|cite|improve this answer








                  edited 4 hours ago

























                  answered 4 hours ago









                  PieterPieter

                  8,97331536




                  8,97331536



























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