Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A
Understanding nrt reading 1- 2 of 2- radiogaphic testing a
Understanding nrt reading 1- 2 of 2- radiogaphic testing a
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When very low kilovoltages, say 20 kV or less, are used, the x-ray intensity<br />
decreases with distance more rapidly than calculations based on the inverse<br />
square law would indicate because <strong>of</strong> absorption <strong>of</strong> the x-rays by the air. Most<br />
industrial radiography, however, is done with radiation so penetrating that the<br />
air absorption need not be considered. These comments also apply to the<br />
time-distance relations discussed below.<br />
Charlie Chong/ Fion Zhang
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