Light dispersion through a window glass

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SUMMARY

Light dispersion through window glass occurs similarly to a glass prism, with different colors exiting at the same angle. The phenomenon is not visible in standard window glass due to the minimal distance between color light rays, which is undetectable by the human eye. However, using thicker glass, such as a 10 mm plate or a 300 mm aquarium, demonstrates measurable differences in exit points due to varying indices of refraction. Specifically, a 300 mm aquarium shows a 3 mm difference between red and blue light, making the dispersion observable.

PREREQUISITES
  • Understanding of Snell's Law
  • Familiarity with indices of refraction
  • Basic knowledge of light behavior in different media
  • Experience with optical experiments using lasers
NEXT STEPS
  • Research Snell's Law applications in optics
  • Explore the effects of varying indices of refraction on light dispersion
  • Conduct experiments with different thicknesses of glass to observe light dispersion
  • Learn about the properties of light in various media, including prisms and lenses
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Students and enthusiasts in physics, optics researchers, and anyone interested in the practical applications of light behavior in different materials.

fawk3s
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Light gets dispersed into different colors in a window glass, just like in a glass prism, but the different colors exit the glass at the same angle. We can't see this phenomenon in a glass window because the distance between the different color lightrays is too small for our eyes to detect, or am I wrong?
If I am not wrong, should we be able to see the phenomenon if we took an enough thick piece of flat glass?

Thanks in advance,
fawk3s
 
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Without being an optics expert I would say your idea is correct. The light should disperse upon entry into the medium and upon exit it would be bent back to its original angle but shifted slightly. I'll see if I can test this somehow if I remember to, I have a red and a green laser I can use.
 
Thanks, I would very much appreciate it. :smile:
 
For example, take a glass plate with a thickness of 10 mm thick. The index of refraction is 1.51 for red, 1.52 for blue. The angle of incidence is 45 degrees. Use Snell's law. The difference for the exit points of red and blue is 0,05 mm. That is hard to detect.

Now take an aquarium with a 'thickness' of 300 mm. The index of refraction is 1.331 for red, 1.343 for blue. The angle of incidence is 45 degrees. The difference for the exit points of red and blue is 3 mm. It should be possible to observe that.
 

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