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radiographic imaging Quiz

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1. If the OID increases, what happens to exposure?




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2. how many filaments are found in the cathode?




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3. define isotropic.




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4. What controls quantity?




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5. What two things are produced by x-ray production?




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6. can x-rays be focused with a lens?




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7. define extrafocal radiation.




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8. define exit/remnant radiation.




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9. x-rays are perfectly safe, true or false?




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10. how fast do x-rays travel?




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11. useful beam from the window.




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12. substance that absorbs more radiation.




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13. source to IR distance.




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14. increases.




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15. substance that absorbs less radiation.




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16. electrons




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17. cathode




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18. thermionic emission.




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19. longer.




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20. two. one large and one small.





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