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Why cant we obtain a virtual image on a screen?

  1. May 4, 2008 #1
    If we can see a virtual image, why cant we obtain it on a screen?
     
  2. jcsd
  3. May 4, 2008 #2

    Doc Al

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    Because with a virtual image the light creating the image does not really originate at the apparent location of the image--and you need light in order to focus an image on a screen.
     
  4. May 4, 2008 #3
    but then, isnt the retina of the eye a screen?
     
  5. May 4, 2008 #4

    Doc Al

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    Sure. That's why the eye must focus a real image on the retina.
     
  6. May 4, 2008 #5
    ah ok..so if we keep a lens in the place of the eye then we can obtain it on a screen behind the lens right? i'll just try that out..

    thanks to my 8th grader younger bro to ask this question to me, so i now know how little physics i know :D
    and of course thanks doc.
     
  7. May 4, 2008 #6

    Doc Al

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    Staff: Mentor

    Yes, do try it. A magnifying glass should work.
     
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