Cursed_Fig@lemmy.world to

Ask Science@lemmy.worldEnglish · 15 hours ago

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

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

Cursed_Fig@lemmy.world to

Ask Science@lemmy.worldEnglish · 15 hours 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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thisfro@slrpnk.net
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14 hours ago
You can think of lightning: It is only visible for some 100s of microseconds (<0.5ms) but it is very well visible. Granted, a lot of photons are emitted in this very short though.

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