It is because the newest “direct” relationship
This simple suggestion can save you… you need to now actually have the essential knowledge you to radiation intensity usually disappear since the distance from the origin grows
Learning about the inverse rectangular law and the head rectangular rules could be extremely perplexing at first. Once you learn the fresh new algorithms and you may dust this new cobwebs away from your algebra enjoy in order to solve on the adjustable making use of the formulas, understanding When to have fun with And that algorithm can be the greatest problem you’ll face. In order to dictate so it, we have to know what types of advice practical question try asking to possess. Why don’t we just take a close look at each and every algorithm: Inverse Square Laws claims: “New strength is inversely proportional into the rectangular of your point.”
I2-
Istep one / (D2) 2 / (D1) 2 Notice that the value for original intensity (I1) is in the numerator, and the value for the original distance (D1) is in the denominator, thus it is “inversely proportional to the square of the distance.” Use this formula when the problem asks you to solve for a unit of radiation intensity, dose, or exposure. Also, remember that radiation “intensity” is not measured in units of mAs, so if the question is asking you for a mAs value, this is not the formula for you. Units of radiation exposure or radiation dose are required for this formula (R – Roentgen, mR – milliRoentgen, rad, rem, Gy – gray, or Sv – Seivert). Read more