X ray tubes
High voltage supply 100 000 V
Filament 6.3 V A.C.
Low voltage supply
Copper target
Vacuum
Thick glass
100 000 V
Fast electrons 6.3 V A.C.
Heat
X rays
Thick
Thin
Few get through
Most get through
Large density
Small density
Few get through
Most get through
X rays mainly pass through low density flesh but not bone
Negative : flesh = black
bone = white
Used to see if your shoes had “enough room top grow” until people in the shops started to experience problems