Concave Mirror Experiment Question

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Homework Help Overview

The discussion revolves around an experiment involving a concave mirror, where participants explore the nature of images formed by the mirror when an object is placed at various distances, particularly between the focal point and the mirror. The main focus is on understanding why a virtual image is produced in certain configurations.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the behavior of light rays in relation to the concave mirror, questioning why images are virtual when the object is within the focal length. There is also inquiry into the nature of images formed when the object is placed beyond the focal length, particularly regarding the perception of images on the mirror itself.

Discussion Status

Some participants express confidence in their understanding but seek further clarification on the concepts involved. Multiple interpretations of image formation are being explored, particularly regarding the distinction between real and virtual images.

Contextual Notes

Participants reference specific positions of the object relative to the focal length and the mirror, indicating a practical experiment context. There are also links to external images that illustrate the concepts being discussed.

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Homework Statement



We did an experiment with a concave mirror.
Concave mirror was placed on optics bench and a candle was placed at designated spots. A screen was used to see where the image was projected. When the object was placed between the focal point, image was not produced on the screen. So the image that was produced inside the mirror was virtual.
Can anyone explain why this happened?
Main question: How do you explain the virtual image that was created when the object was placed between the focal length and the mirror?


The Attempt at a Solution


I'm guessing that the light rays from the object never intersect at a point, but converge behind the mirror therefore creating an image that cannot be seen on the screen but instead in the mirror.
This photo explains a bit to me, but I'm still confused.
http://en.wikipedia.org/wiki/File:Concavemirror_raydiagram_F.svg
 
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I'm guessing that the light rays from the object never intersect at a point, but converge behind the mirror therefore creating an image that cannot be seen on the screen but instead in the mirror.
Correct - what's the problem?
 
Good to know I'm on the right path, but i'd like a more completed answer of what's happening.
 
I have a question regarding this topic: How do you explain the image formed on the spherical mirror on the left of the following image?

http://www.uwsp.edu/physastr/kmenning/images/spherical.mirrors.jpg

Obviously, that mirror is a concave mirror and the candle has been placed at a point farther than the focal length of the mirror. The image then is real and inverted, and can be projected on a screen.

My question is regarding the image that appears on the mirror itself. The image of the candle seems to be located on the back of the mirror, as if it were a virtual image.

In other words: if real images formed by concave mirrors are located on front of the mirror, why do we see the image on the mirror itself, as if it were located behind the mirror?

Could you please give an explanation for that?

The attempt at a solution
I guess concave mirrors act like flat mirrors for the real images they form.
 
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