Why cant we obtain a virtual image on a screen?

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Discussion Overview

The discussion revolves around the question of why a virtual image cannot be projected onto a screen. Participants explore the nature of virtual images, their formation, and the conditions required for image projection.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions the ability to obtain a virtual image on a screen, prompting exploration of the underlying principles.
  • Another participant explains that virtual images do not have light originating from their apparent location, which is necessary for focusing an image on a screen.
  • There is a suggestion that the retina of the eye functions similarly to a screen, as it requires a real image to focus properly.
  • A participant proposes that using a lens in place of the eye could allow for the projection of a virtual image onto a screen, indicating a practical experiment to test this idea.
  • Another participant agrees with the lens suggestion and mentions that a magnifying glass could be effective for this purpose.

Areas of Agreement / Disagreement

Participants express differing views on the nature of virtual images and their projection. While some agree on the concept of using a lens, the overall discussion remains unresolved regarding the fundamental question of virtual image projection.

Contextual Notes

The discussion does not resolve the assumptions about the nature of virtual images and their interaction with screens, nor does it clarify the specific conditions under which a lens might allow for the projection of a virtual image.

Raze2dust
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If we can see a virtual image, why can't we obtain it on a screen?
 
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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.
 
but then, isn't the retina of the eye a screen?
 
Raze2dust said:
but then, isn't the retina of the eye a screen?
Sure. That's why the eye must focus a real image on the retina.
 
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.
 
Raze2dust said:
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..
Yes, do try it. A magnifying glass should work.
 

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