Transcription: When you turn on the X-ray tube, electrons flow from the negative cathode towards a tungsten target set in the positive copper anode. These electrons produce X-rays in two ways. First, an electron may be slowed and deflected by a tungsten atom, giving off an X-ray photon as it loses energy. Second, an incoming electron may knock one of the tungsten atom's own electrons out of an inner orbit. An X-ray photon is produced as an electron from an outer orbit moves in to take its place. The tungsten target is angled so that the X-ray beam emerges from a window in the side of the tube.
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