Why doesn’t a normal window produce an apparent rainbow?What really causes light/photons to appear slower in media?light color and refractionTime multiplexed detector - pulse dispersion - foruier limits.Cheap DIY Zernike-Phasecontrast: Optical Thickness of a inkjet/laser printed contour for phasering?
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Why doesn’t a normal window produce an apparent rainbow?
What really causes light/photons to appear slower in media?light color and refractionTime multiplexed detector - pulse dispersion - foruier limits.Cheap DIY Zernike-Phasecontrast: Optical Thickness of a inkjet/laser printed contour for phasering?
$begingroup$
When light diffracts in a prism it creates a rainbow. My question is, why don’t all windows or transparent objects create this dispersion, i.e. why is the refractive index dependent on frequency in a dispersive prism, and not in a window? (My guess is that the refractive index doesn’t change as much, but I don’t really have an idea).
optics visible-light refraction geometric-optics dispersion
edited 8 hours ago
Qmechanic♦
109k122081281
asked 9 hours ago
MelvinMelvin
664
$endgroup$
add a comment |
$begingroup$
When light diffracts in a prism it creates a rainbow. My question is, why don’t all windows or transparent objects create this dispersion, i.e. why is the refractive index dependent on frequency in a dispersive prism, and not in a window? (My guess is that the refractive index doesn’t change as much, but I don’t really have an idea).
optics visible-light refraction geometric-optics dispersion
edited 8 hours ago
Qmechanic♦
109k122081281
asked 9 hours ago
MelvinMelvin
664
$endgroup$
1
$begingroup$
Glass windows and glass prisms are made of pretty much the same glass. The issue is the geometry.
$endgroup$
– jacob1729
9 hours ago
$begingroup$
Some thick windows used for large shop displays have beveled edges, and you can sometime see a spectrum off of those.
$endgroup$
– dmckee♦
8 hours ago
add a comment |
$begingroup$
When light diffracts in a prism it creates a rainbow. My question is, why don’t all windows or transparent objects create this dispersion, i.e. why is the refractive index dependent on frequency in a dispersive prism, and not in a window? (My guess is that the refractive index doesn’t change as much, but I don’t really have an idea).
optics visible-light refraction geometric-optics dispersion
edited 8 hours ago
Qmechanic♦
109k122081281
asked 9 hours ago
MelvinMelvin
664
$endgroup$
When light diffracts in a prism it creates a rainbow. My question is, why don’t all windows or transparent objects create this dispersion, i.e. why is the refractive index dependent on frequency in a dispersive prism, and not in a window? (My guess is that the refractive index doesn’t change as much, but I don’t really have an idea).
optics visible-light refraction geometric-optics dispersion
optics visible-light refraction geometric-optics dispersion
edited 8 hours ago
Qmechanic♦
109k122081281
asked 9 hours ago
MelvinMelvin
664
edited 8 hours ago
Qmechanic♦
109k122081281
asked 9 hours ago
MelvinMelvin
664
edited 8 hours ago
Qmechanic♦
109k122081281
edited 8 hours ago
Qmechanic♦
109k122081281
edited 8 hours ago
Qmechanic♦
109k122081281
109k122081281
asked 9 hours ago
MelvinMelvin
664
asked 9 hours ago
MelvinMelvin
664
asked 9 hours ago
MelvinMelvin
664
664
1
$begingroup$
Glass windows and glass prisms are made of pretty much the same glass. The issue is the geometry.
$endgroup$
– jacob1729
9 hours ago
$begingroup$
Some thick windows used for large shop displays have beveled edges, and you can sometime see a spectrum off of those.
$endgroup$
– dmckee♦
8 hours ago
add a comment |
1
$begingroup$
Glass windows and glass prisms are made of pretty much the same glass. The issue is the geometry.
$endgroup$
– jacob1729
9 hours ago
$begingroup$
Some thick windows used for large shop displays have beveled edges, and you can sometime see a spectrum off of those.
$endgroup$
– dmckee♦
8 hours ago
1
1
$begingroup$
Glass windows and glass prisms are made of pretty much the same glass. The issue is the geometry.
$endgroup$
– jacob1729
9 hours ago
$begingroup$
Glass windows and glass prisms are made of pretty much the same glass. The issue is the geometry.
$endgroup$
– jacob1729
9 hours ago
$begingroup$
Some thick windows used for large shop displays have beveled edges, and you can sometime see a spectrum off of those.
$endgroup$
– dmckee♦
8 hours ago
$begingroup$
Some thick windows used for large shop displays have beveled edges, and you can sometime see a spectrum off of those.
$endgroup$
– dmckee♦
8 hours ago
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
It does create the rainbow, but it is almost impossible to notice.
When light direction is changed on the glass-air interface - there is always a dispersion : light with different wavelength will refract at different angle and thus create rainbow.
The issue is that when light hits second glass-air interface - incidence angle is opposite, and dispersion almost perfectly compensate, and this recombine light into white beam.
You can still notice rainbow if you take very thick glass (~50mm), and very narrow and perfectly collimated beam (<0.05mm).
In a prism, where incidence angles for first and second refractions are very different - this compensation is not working and one can see the rainbow much easier.
answered 8 hours ago
BarsMonsterBarsMonster
51352364
$endgroup$
add a comment |
$begingroup$
The glass panes in a window don't actually deflect light based on their refractive index (at least not to a reasonable approximation).
The image shows that if you shine a ray at a perfect rectangle, the light comes out parallel to the incident ray. Thus you don't get dispersion, because there is no deflection being caused.
Of course, windows don't have perfectly parallel sides, and if you extended them far enough they'd eventually meet. As such, a window looks like a prism with a very small apex angle $A$.
answered 8 hours ago
jacob1729jacob1729
1,145517
$endgroup$
add a comment |
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2 Answers
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2 Answers
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$begingroup$
It does create the rainbow, but it is almost impossible to notice.
When light direction is changed on the glass-air interface - there is always a dispersion : light with different wavelength will refract at different angle and thus create rainbow.
The issue is that when light hits second glass-air interface - incidence angle is opposite, and dispersion almost perfectly compensate, and this recombine light into white beam.
You can still notice rainbow if you take very thick glass (~50mm), and very narrow and perfectly collimated beam (<0.05mm).
In a prism, where incidence angles for first and second refractions are very different - this compensation is not working and one can see the rainbow much easier.
answered 8 hours ago
BarsMonsterBarsMonster
51352364
$endgroup$
add a comment |
$begingroup$
It does create the rainbow, but it is almost impossible to notice.
When light direction is changed on the glass-air interface - there is always a dispersion : light with different wavelength will refract at different angle and thus create rainbow.
The issue is that when light hits second glass-air interface - incidence angle is opposite, and dispersion almost perfectly compensate, and this recombine light into white beam.
You can still notice rainbow if you take very thick glass (~50mm), and very narrow and perfectly collimated beam (<0.05mm).
In a prism, where incidence angles for first and second refractions are very different - this compensation is not working and one can see the rainbow much easier.
answered 8 hours ago
BarsMonsterBarsMonster
51352364
$endgroup$
add a comment |
$begingroup$
It does create the rainbow, but it is almost impossible to notice.
When light direction is changed on the glass-air interface - there is always a dispersion : light with different wavelength will refract at different angle and thus create rainbow.
The issue is that when light hits second glass-air interface - incidence angle is opposite, and dispersion almost perfectly compensate, and this recombine light into white beam.
You can still notice rainbow if you take very thick glass (~50mm), and very narrow and perfectly collimated beam (<0.05mm).
In a prism, where incidence angles for first and second refractions are very different - this compensation is not working and one can see the rainbow much easier.
answered 8 hours ago
BarsMonsterBarsMonster
51352364
$endgroup$
It does create the rainbow, but it is almost impossible to notice.
When light direction is changed on the glass-air interface - there is always a dispersion : light with different wavelength will refract at different angle and thus create rainbow.
The issue is that when light hits second glass-air interface - incidence angle is opposite, and dispersion almost perfectly compensate, and this recombine light into white beam.
You can still notice rainbow if you take very thick glass (~50mm), and very narrow and perfectly collimated beam (<0.05mm).
In a prism, where incidence angles for first and second refractions are very different - this compensation is not working and one can see the rainbow much easier.
answered 8 hours ago
BarsMonsterBarsMonster
51352364
answered 8 hours ago
BarsMonsterBarsMonster
51352364
answered 8 hours ago
BarsMonsterBarsMonster
51352364
answered 8 hours ago
BarsMonsterBarsMonster
51352364
51352364
add a comment |
add a comment |
$begingroup$
The glass panes in a window don't actually deflect light based on their refractive index (at least not to a reasonable approximation).
The image shows that if you shine a ray at a perfect rectangle, the light comes out parallel to the incident ray. Thus you don't get dispersion, because there is no deflection being caused.
Of course, windows don't have perfectly parallel sides, and if you extended them far enough they'd eventually meet. As such, a window looks like a prism with a very small apex angle $A$.
answered 8 hours ago
jacob1729jacob1729
1,145517
$endgroup$
add a comment |
$begingroup$
The glass panes in a window don't actually deflect light based on their refractive index (at least not to a reasonable approximation).
The image shows that if you shine a ray at a perfect rectangle, the light comes out parallel to the incident ray. Thus you don't get dispersion, because there is no deflection being caused.
Of course, windows don't have perfectly parallel sides, and if you extended them far enough they'd eventually meet. As such, a window looks like a prism with a very small apex angle $A$.
answered 8 hours ago
jacob1729jacob1729
1,145517
$endgroup$
add a comment |
$begingroup$
The glass panes in a window don't actually deflect light based on their refractive index (at least not to a reasonable approximation).
The image shows that if you shine a ray at a perfect rectangle, the light comes out parallel to the incident ray. Thus you don't get dispersion, because there is no deflection being caused.
Of course, windows don't have perfectly parallel sides, and if you extended them far enough they'd eventually meet. As such, a window looks like a prism with a very small apex angle $A$.
answered 8 hours ago
jacob1729jacob1729
1,145517
$endgroup$
The glass panes in a window don't actually deflect light based on their refractive index (at least not to a reasonable approximation).
The image shows that if you shine a ray at a perfect rectangle, the light comes out parallel to the incident ray. Thus you don't get dispersion, because there is no deflection being caused.
Of course, windows don't have perfectly parallel sides, and if you extended them far enough they'd eventually meet. As such, a window looks like a prism with a very small apex angle $A$.
answered 8 hours ago
jacob1729jacob1729
1,145517
answered 8 hours ago
jacob1729jacob1729
1,145517
answered 8 hours ago
jacob1729jacob1729
1,145517
answered 8 hours ago
jacob1729jacob1729
1,145517
1,145517
add a comment |
add a comment |
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$begingroup$
Glass windows and glass prisms are made of pretty much the same glass. The issue is the geometry.
$endgroup$
– jacob1729
9 hours ago
$begingroup$
Some thick windows used for large shop displays have beveled edges, and you can sometime see a spectrum off of those.
$endgroup$
– dmckee♦
8 hours ago