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I Sweat on Screen, Interference or Refraction?

  1. Apr 26, 2017 #1
    When we touch the screen of a mobile or laptop we can see some colors on the sweat adhered to the screen.Which property of light can explain it? Is it for interference or for refraction?
  2. jcsd
  3. Apr 26, 2017 #2
    I would think it would be the screen light refracting in addition to the outside light reflecting. Anyone else?
  4. Apr 26, 2017 #3
    If there's a thin film on the screen, then it's interference.
  5. Apr 26, 2017 #4


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    Colors you see when the display is off are reflection and interference at a thin film. Colors you see with display on are refraction at droplets enlarging sub pixels.
  6. Apr 27, 2017 #5
    Can you tell it in more details?
  7. Apr 27, 2017 #6


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