X-rays are man made, so no.
no.
No, the earth's atmosphere reflects and absorbs x-rays, so they do not make it to the surface.
Yes.
Ozone
radiolucent allows x-ray pass through radiopaque does not allow it to pass through
Yes you can very clearly and its just so amazing!
a grid is a device placed in front of the image receptor which only allows xrays to travel directly through from the tube and prevent xrays which have been "scattered" from passing through to the image. This gives a much clearer resulting image. Grids are generally only used on thicker body parts where scattered xrays are more of an issue
They experimented with xrays on the prisoners in the concentration camps. Mostly at Auschwitz.
Bones always appear as white images in regular xrays. However they arent really white because the film is clear, the plastic on the view box is white. But on xray film it is coated with a metalic layer. The xrays make the metalic layer stick to the film. So the black part of the film is where all the xrays reach the film. If the area on the xray is gray, then that means that some of the xrays are getting through implying that the structure is more dense than the black part. Soft tissue appears gray. The bone is a very dense structure allowing minimal to no xrays getting through. The film is then put through the processor and the film runs through chemicals that make the picture "stay" on the film. It is then rinsed and dried. Since the xrays make the metalic layer stick, none stick to the area of the bone because no radiation got through and the layer was washed off during processing. This is why bones appear white, they are the densest structure.
I just got my xrays taken for my left knee, it was four xrays for $100, it may be more other places
In our atmosphere, about the size of the earth. Perpetual and statically charged.
Xrays are damaging to developing babies. Only as last resort.