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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Milliamperage-Time Relation<br />
Rule: The milliamperage (M) required for a given exposure is inversely<br />
proportional to the time (T):<br />
Another way <strong>of</strong> expressing this is to say that for a given set <strong>of</strong> conditions<br />
(voltage, distance, etc), the product <strong>of</strong> milliamperage and time is constant for<br />
the same photographic effect.<br />
Thus, M1T1 = M2T2 = M3T3 = C, a constant.<br />
This is commonly referred to as the reciprocity law. (Important exceptions are<br />
discussed below.)<br />
To solve for either a new time (T2) or a new milliamperage (M2), simply follow<br />
the steps shown in the example in "Milliamperage-Distance Relation".<br />
Charlie Chong/ Fion Zhang
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