How does the distance affect x-ray output in terms of the quality and quantity ?

the quantity of radiation in an x-ray beam is a measure of the number of photons in the beam that comes quantity and exposure are of 10 interchange in radiography as the higher the quantity or amount of radiation the greater the exposure to a structure in fact probably the simplest method of comparing the quantity of two beams of radiation is to compare the exposure received by a structure as well shall see in chapter 27 the exposure is measured using the unit of air kerma as the quantity of radiation increases so does the inside intensity of the beam

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layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

the answer would be c