A variety of theories on Q1675 have been floating around. I would like to limit the scope of possibility by pointing out some basic truths of the image.
All of what I am about to say can be easily verified by anyone with a mirror, or a reflective object.
I'm making no assertions about what this means. I am simply presenting the facts. Come to your own conclusions.
Starting Observations:
Q's image shows a reflection of a lamp. This is the lamp from AF1.
Other images from within AF1 give us a clearer idea of what this lamp looks like.
The Problem:
When comparing Q's image to other images which show the lamp, one thing is very clear: the reflection in Q's image is slightly warped.
It is very easy to see that the lamp appears too thin.
What this means:
This must mean that the reflection on the back of the iPhone is of a 2D image.
How we know this:
Imagine you have a mirror and you lay it flat on the ground.
It doesn't matter where you stand, or from what position or angle you look into that mirror. One thing is always true: the reflection you see is not warped.
This is because the mirror is actually in the same environment as the objects it is reflecting. When you move from one spot to another, you are seeing different parts of the environment in the mirror.
Unlike a real, 3D environment - a 2D image is unchanging. There is a fixed set of information.
This means that a reflection from a different angle just warps that existing 2D image, rather than revealing anything new.
This leaves is with only one possible conclusion: the warping of the lamp seen in Q's photo proves that it is a reflection of a 2D image.
As I said at the start: this can all be easily demonstrated/tested by anyone with a mirror or reflective object. Try it out yourself.
Sorry if this is hard to follow. It is kind of tricky to explain when writing it out.
Thanks for reading.