X - RAY

X-ray tupe

  X-rays come near the high-energy end of the electromagnetic spectrum. In an X ray tube, electrically heated filament are accelerated towards a heavy metal target by an intense electric field. Because there is no air in the tube, the electrons reach high speeds; when they are rapidly decelerated by hitting the target, their kinetic energy turns into high  frequency electromagnetic radiation (X - rays). Used mostly in medical imaging, X rays pass through muscle but are absorbed by bone, so that an image recorded on photographic film reveals the bones as shadows.

X-ray Photograph of a Hand