how is everything in focus?--do xray machines work by "casting an x-ray shadow" or something---I'm thinking that's what's going on....so the xrays have to come out perfectly parallel to each other then, right?
Unlike a camera with film which captures the reflected light through a lens which has projected it on to the film, the x-rays go through the subject and strike the film or sensitized plate. The difference in densities of what is being x-rayed stop or slow the x-rays so the amount of x-ray striking the film will determine shades on the film. Something that is radio-opaque will be clear or white and something that is radiolucent will be black and so forth. The setting on the x-ray machine can be adjusted to emit different degrees so the head shot by an orthodontist is set to show both hard and soft tissues.
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links. To read our full affiliate disclosure statement please click Here.