What is the physics concept of multiple images in a mirror or computer screen?

rbellybo: What is the physics concept of multiple images in a mirror or computer screen?
For example, if you have a webcam that is separate from your computer and you turned it so that it faced the computer, you will see on your computer screen, multiple images of the computer and cascading back. I unfortunately cannot find a photo to demonstrate what I am talking about; but can anyone explain this physics concept to me? Something about reflection? I really don’t know. PLEASE HURRY!

Answers and Views:

Answer by CPL
It is called Droste Effect. But that is just the name of such artistic expression.

Since you post this question under the physics category, perhaps you are looking for an explanation of the effect more than just the name.

Basically the effect that you see in two mirrors facing each other or when you point your web-cam towards you computer monitor is a result of a feedback loop that goes on infinitely.

When you include the computer monitor in the view of the camera and then the content of the compute monitor is again feed back into the monitor again. So it is a recursive loop of input going to the output and which again feed into the input again and the loop just go infinitely until resolution of the monitor cannot show any finer details of the recursive image anymore.

The same happen in two mirrors facing each other. The reflected image simply bounced around the two reflective surface until the images get too dim to see.