Photons and human distance perception

  • Thread starter VBakija
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  • #1
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Main Question or Discussion Point

Hello,
I don't even know if this two are related in the way I think, but this is what i would like to know.

for example
If we traveled far away from the planet earth and looked back at it (no telescopes), we would see a blue marble but would not be able to see for example our familly eatingin in the kitchen.
If what we see are photons reflected from the surface of earth what happens with them in the vacuum traveling to us in the distance? why can't we zoom ???
if we look with the telescope from the distance we've traveled we could see in the kitchen that means that the photons carrying visual information are acctually reaching us but we don't register them the same way.
do we make room for all other photons coming in our visual area from other planets and stars in the panorama and discard details od earth ?
do photons over distances entangle in some way to form "the bigger picture" ?
do they spread like a wave so we have to have 20mx20m size eye to apture all the details ?


Im sorry for the confusing question but me & physics = pigs & flying


Thanks to anyone having patience to explain it to me.
 

Answers and Replies

  • #2
mathman
Science Advisor
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The problem you are asking about is not in the photons in space, but in the resolution capacity of the retina.
 
  • #3
russ_watters
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In other words, it's a geometry question. What makes an object look large or small to us is the angle subtended by the object. Despite their actual size, the sun and moon, for example, look the same size because they subtend the same angle.

Draw triangles and solve for the angle for both the moon and sun and you'll see why they look the same size.
 

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