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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?
$begingroup$
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?
visible-light speed-of-light acoustics refraction
$endgroup$
add a comment |
$begingroup$
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?
visible-light speed-of-light acoustics refraction
$endgroup$
$begingroup$
An effect like this is used in acousto-optic modulators.
$endgroup$
– Emil
57 mins ago
add a comment |
$begingroup$
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?
visible-light speed-of-light acoustics refraction
$endgroup$
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
visible-light speed-of-light acoustics refraction
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
add a comment |
$begingroup$
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
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
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
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.
$endgroup$
add a comment |
$begingroup$
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
$endgroup$
add a comment |
Your Answer
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
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
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.
$endgroup$
add a comment |
$begingroup$
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
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.
$endgroup$
add a comment |
$begingroup$
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
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.
$endgroup$
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
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.
edited 5 hours ago
answered 6 hours ago
Thomas FritschThomas Fritsch
920212
920212
add a comment |
add a comment |
$begingroup$
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
$endgroup$
add a comment |
$begingroup$
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
$endgroup$
add a comment |
$begingroup$
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
$endgroup$
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
edited 4 hours ago
answered 4 hours ago
PieterPieter
8,97331536
8,97331536
add a comment |
add a comment |
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$begingroup$
An effect like this is used in acousto-optic modulators.
$endgroup$
– Emil
57 mins ago