Questions on Lenses: Projecting a Slide on a Screen

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Homework Help Overview

The discussion revolves around the behavior of images produced by slide projectors, specifically focusing on the nature of virtual and real images and how they appear on screens. The subject area includes optics, particularly the functioning of lenses.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore whether a virtual image can be projected onto a screen and discuss the implications of image orientation (upright or upside down). There are attempts to clarify the definitions of virtual and real images in the context of slide projection.

Discussion Status

The discussion includes various viewpoints on the nature of images produced by projectors. Some participants express uncertainty about the characteristics of virtual images, while others provide clarifications regarding the requirements for an image to be visible on a screen. There is an indication of productive dialogue, but no consensus has been reached.

Contextual Notes

Participants are navigating assumptions about the types of images that can be formed by projectors and the conditions necessary for those images to be displayed on a screen. The original poster's understanding of image characteristics is also under examination.

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Homework Statement


You wish to project a slide on a screen. One of the letters on the slide is a p. When you place the slide in the projector, how much the letter look when you insert the slide(as seen from behind the projector)? Explain.

a) p
b) d
c) b
d) q

Homework Equations


How converging (convex) and Diverging (concave) lenses work.

The Attempt at a Solution


EDIT: I believe the answer is all letters will be the same because slide projectors produce images that are the same size, virtual and upright. Could someone tell me if I'm right or wrong? Thanks.
 
Last edited:
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A slide projector projects images that are formed on some kind of screen. Can you form a virtual image on a screen?
 
G01 said:
A slide projector projects images that are formed on some kind of screen. Can you form a virtual image on a screen?

I do believe virtual images can be shown on a screen, but I think the image would be real, because the light comes together or something like that?
 
A virtual image cannot be formed on a screen. In a virtual image, the light seems as if if comes from a certain point. The image is at this point. Since the light isn't actually there, a screen placed there will not show an image.

So what type of image do you want to form in order for it to appear on a screen and will it be upright or upside down?
 
Thanks, I got it!
 

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