Why do we see a spectrum after Swimming?

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    Spectrum Swimming
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Discussion Overview

The discussion revolves around the phenomenon of seeing a spectrum around light after swimming, particularly in chlorinated pool water. Participants explore potential explanations for this observation, considering both physical and chemical factors affecting the eyes.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant notes that the presence of water on the eye's surface may create a non-spherical shape, acting as a prism that refracts light into a spectrum.
  • Another participant suggests that the phenomenon may also occur when crying, relating it to the shape of tear drops and their refractive properties.
  • A different viewpoint proposes that chemicals in the pool water, such as chlorine, might be absorbed by the cornea, causing fogging and potentially affecting light perception.
  • One participant expresses a desire to conduct experiments to further investigate the conditions under which the spectrum appears, particularly by altering head position while looking at a light source.

Areas of Agreement / Disagreement

Participants generally agree on the need for experimentation and exploration of the phenomenon, but multiple competing views regarding the underlying causes remain unresolved.

Contextual Notes

There are assumptions about the effects of water and chemicals on the eye that are not fully explored, and the discussion does not clarify the specific conditions under which the spectrum is observed.

anuragkanase
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Hey guys,
I recently noticed that, after a swim, when you look at the light, you see a spectrum around it. The light was white light. And you see it with naked eyes.
Can you guys explain this phenomenon?
The water did contain Chlorine and maybe other necessary chemicals required in swimming pool.
Thank you.
 
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I am not a biologist or a medic but I do know that after I swam my eyes watered more.

The excess water on the surface of my eye is affected by surface tension and gravity so it must be pulled into a non spherical curve which hence is a prism and will refract light of different wavelengths at different angle so producing a spectrum.

Do what all good physicists do and I am going to do next time I swim - do an experiment.

If I hold my head as close as possible to vertically downwards and look at a light source directly beneath I would expect the spectrum to disappear


Regards

Sam
 
You're right. I need to experiment it different ways. But it must happen when we cry. Oh, I am not certain but your answer is somewhat correctly related to sphere formed by tear drop. And I think yes we see a spectrum when we cry.
Holy, I can't even cry right now.
Thanks for the answer.
 
My guess that the cornea is absorbing some of the chlorine or other chemicals from the water, (chemicals tend to transfer from higher concentrated fluids to lower concentrated fluids), resulting in a slight fogging of the cornea. Once you're out of the pool, eventually the chlorine or other chemicals will get dispersed by the fluids produced at your eyes.
 

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