How Everything Works
How Everything Works How Everything Works
 

QUESTIONS AND ANSWERS
 
Question 464

If bones "stop" electrons, then why do we see a skeletal image on an X-ray? Would we get a negative image?
The bones cast shadows on the film; wherever there is bone, few X-rays strike the film. When the film is developed, it turns black wherever X-rays hit it. Thus the areas that were shadowed by the bone appear white.
         

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