Persistence of Vision: Intensity of Green Circle?

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SUMMARY

The discussion centers on the phenomenon of Persistence of Vision as it relates to a 5mm bright green LED used in a circular motion, such as on a bike wheel. It concludes that the light intensity of the perceived green circle will be spread around the entire circumference, rather than being concentrated at the point of the LED. This understanding is crucial for creating a persistence of vision display that is visible in sunlight.

PREREQUISITES
  • Understanding of Persistence of Vision principles
  • Basic knowledge of LED technology and specifications
  • Familiarity with light intensity measurement
  • Experience with display design for visibility in bright conditions
NEXT STEPS
  • Research LED brightness and visibility in outdoor conditions
  • Explore techniques for enhancing light intensity in displays
  • Learn about the physics of light dispersion and perception
  • Investigate design strategies for persistence of vision displays
USEFUL FOR

This discussion is beneficial for electrical engineers, display designers, and hobbyists interested in creating effective visual displays using LEDs, particularly in environments with high ambient light.

bikfreak
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Persistence of Vision!

If you wave a 5mm bright green led in a circle fast
enough you see a green circle (say you attach it to a
bike wheel and spin the wheel). What will the
intensity of that green circle be? Will the light
intensity be smeared throughout the whole
circumference of the circle? Or will the light
intensity of the green circle be similar in light
intensity to the light intensity of that 1 green led?

I am trying to make a persistence of vision display
that would be sunlight visible, so this is why I need
to find an answer somehow. Any help would be
appreciated.
 
Last edited:
Science news on Phys.org
the intensity will be spread around the circle.
 

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