Notices
Results 1 to 5 of 5

Thread: Light and dark

  1. #1 Light and dark 
    Forum Sophomore Hymenophyllum's Avatar
    Join Date
    May 2013
    Location
    Somewhere over the rainbow
    Posts
    170
    I wonder how is it possible that after being outdoors, when the sun shines and going back home i see different colors in my eyes?


    He is numb from his toes down
    Reply With Quote  
     

  2.  
     

  3. #2  
    Bullshit Intolerant PhDemon's Avatar
    Join Date
    Feb 2013
    Location
    Newcastle-upon-Tyne, UK
    Posts
    5,049
    In bright sunlight outdoors your pupils dilate, on going back indoors where it is not so bright they re-adjust, the "different colours" initially are probably due to this adjustment of the pupils, if they persist it is due to the differing light levels/sources in the room (the colours you see are due to reflected light -- light sources indoors may have a different spectrum to sunlight and so the reflected light will be different.


    Reply With Quote  
     

  4. #3  
    exchemist
    Join Date
    May 2013
    Location
    London
    Posts
    3,115
    Quote Originally Posted by PhDemon View Post
    In bright sunlight outdoors your pupils dilate, on going back indoors where it is not so bright they re-adjust, the "different colours" initially are probably due to this adjustment of the pupils, if they persist it is due to the differing light levels/sources in the room (the colours you see are due to reflected light -- light sources indoors may have a different spectrum to sunlight and so the reflected light will be different.
    I think I recall there may be another factor, due to fatigue in the colour receptors most strongly stimulated, so that if for example you see a strongly blue object, you can get a red image of it when you blink.
    Reply With Quote  
     

  5. #4  
    Bullshit Intolerant PhDemon's Avatar
    Join Date
    Feb 2013
    Location
    Newcastle-upon-Tyne, UK
    Posts
    5,049
    Interesting, I hadn't heard that before.
    Reply With Quote  
     

  6. #5  
    Forum Professor Zwolver's Avatar
    Join Date
    May 2006
    Location
    Netherlands
    Posts
    1,667
    There is also depletion of the cones and rods. They can only fire a certain number of times per minut, and they can't choose to not fire if light hits them. So they are temporarily depleted.. Your pupil may stop some light, but it can't stop all.

    Also chemical imbalance in the eye may cause your retina to be able to fire less times a minut. Age is also a factor, as is genetics..
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
    Reply With Quote  
     

Similar Threads

  1. Spiral light paths and dark matter
    By Laurieag in forum Personal Theories & Alternative Ideas
    Replies: 0
    Last Post: April 29th, 2014, 07:10 PM
  2. Light = Dark Matter ???
    By Tazmainian Guru in forum Personal Theories & Alternative Ideas
    Replies: 4
    Last Post: September 28th, 2011, 06:16 PM
  3. Dark energy, Dark matter, Fine tuning problem,Negative mass!
    By icarus2 in forum Personal Theories & Alternative Ideas
    Replies: 18
    Last Post: July 31st, 2011, 12:12 PM
  4. Comparing: Tired Light vs. Dark Matter/Energy
    By kojax in forum Astronomy & Cosmology
    Replies: 3
    Last Post: October 1st, 2008, 07:04 PM
  5. Glow in the dark light
    By monaro_waky in forum Physics
    Replies: 7
    Last Post: February 6th, 2007, 10:17 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •