Witnessing Colorful Interference Patterns with a Benham Top

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Discussion Overview

The discussion revolves around the phenomenon of observing colors when spinning a Benham top, exploring the underlying mechanisms and theories related to color perception and interference patterns. Participants delve into the relationship between light, color, and human visual perception.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant suggests that the colors seen are due to the dashed black lines on the top causing white light to become out of phase, leading to interference among red, green, and yellow photons.
  • Another participant counters that different photons do not interfere with each other and points out a misunderstanding regarding the interference of a photon's probability function with itself.
  • A participant expresses uncertainty about the exact mechanism, mentioning that it may relate to the pulsing of white light and how the brain interprets these signals as colors.
  • There is a suggestion that the varying reaction times of different retinal cells could contribute to the perception of colors, indicating a potential neurological aspect to the phenomenon.
  • One participant proposes measuring the reflection spectra with a spectrum analyzer to investigate whether any colors other than white would be detected.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the exact cause of the observed colors, with multiple competing views and uncertainties remaining about the interplay between light, perception, and neurological factors.

Contextual Notes

Limitations include the lack of precise understanding of the mechanisms involved, the dependence on individual perception, and the unresolved nature of the proposed explanations.

cragar
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When i spin a benham top why do i see colors ,
Is this because of the dashed black lines , that i am now pulsing white light , so now the white light is out of phase and the red , green , yellow photons are interfering so i see colors ,
Is this is what is going on .
 
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cragar said:
When i spin a benham top why do i see colors ,
According to http://en.wikipedia.org/wiki/Benham%27s_top" , nobody knows for sure.
Is this because of the dashed black lines , that i am now pulsing white light , so now the white light is out of phase and the red , green , yellow photons are interfering so i see colors , Is this is what is going on .
No, it's not. Different photons don't interfere with each other. You are confusing the effect of the probability function of a photon taking multiple paths interfering with itself.
 
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ok then what's going on , i know it as something to with pulsing white light so my brain will see colors .
 
someone has to know something about a benham top .
we are just spinning something with black and white on it .
 
From a quick search, it seems that precise reasons are not known, but it may have to do with the reaction times of vision cells on our retinas.

For example, cells that detect red may have a slighly different reaction time than cells that detect blue. In this case, the various white light pulses would be time-resolved by the nerve cells.

But apparently, different people see different colors at diffrent areas and times, so I believe this is mostly a neurological issue, beyond what can be precisely described by physics.

Perhaps someone could measure the reflection spectra with a spectrum analyser. I suspect no colors would be detected, other than the original white.
 

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