DVD & VHS Video Library Catalog - Michigan
Where a void or discontinuity exists, there is essentially less material to absorb the radiation. Therefore, more radiation will pass through this section and a dark spot corresponding to the projected position of the void will appear on the film. 70. a) 1.8 - 4.0 ( for any X-ray source ) b) 2.0 – 4.0 ( for any gamma source) 71. e. ................
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