Persistence of Vision: Intensity of Green Circle?

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When a 5mm bright green LED is waved quickly in a circle, it creates the illusion of a continuous green circle due to persistence of vision. The intensity of the light in this display will not be uniform; instead, it will be spread around the circumference of the circle. This means that the perceived brightness of the green circle will be less than that of the single LED. For a persistence of vision display to be visible in sunlight, careful consideration of LED brightness and the speed of rotation is necessary. Achieving a sunlight-visible display requires optimizing the intensity and distribution of light emitted.
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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:
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the intensity will be spread around the circle.
 

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