Cursed_Fig@lemmy.world to

Ask Science@lemmy.worldEnglish · 1 day ago

For how long must light be emitted for a human eye to perceive it?

9

29

For how long must light be emitted for a human eye to perceive it?

Cursed_Fig@lemmy.world to

Ask Science@lemmy.worldEnglish · 1 day ago

9

For how long must light be emitted for a human eye to perceive it?

Would a person notice a flash of light that lasted 10 ms?
Does the intensity of the light matter?
How much light is a photon, anyway? Does is take thousands or trillions of photons interacting with the eye to register as light?

1am where I live and I’m wondering

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sin_free_for_00_days
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A 2016 Nature study found the human eye can detect a single photon just above chance, while conscious sight needs about 5 to 9 photons.
- threelonmusketeers@sh.itjust.works
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  A 2016 Nature study
  
  To be more specific, this study in Nature Communications: https://www.nature.com/articles/ncomms12172
  
  Edit: Ha! NoSpotOfGround beat me by 2 minutes.

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