A shielding device with a thickness equivalent to 2 HVL will reduce the quantity of radiation to:

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Multiple Choice

A shielding device with a thickness equivalent to 2 HVL will reduce the quantity of radiation to:

Explanation:
HVL is the thickness needed to cut the radiation intensity in half. If shielding equals two HVLs, the beam is halved twice. Starting with the original quantity, after the first HVL you have half, and after the second HVL you have one quarter of the original. So the remaining radiation is 25% of the initial amount. The other options correspond to only one HVL (50%), no shielding (100%), or an incorrect interpretation (75% remaining).

HVL is the thickness needed to cut the radiation intensity in half. If shielding equals two HVLs, the beam is halved twice. Starting with the original quantity, after the first HVL you have half, and after the second HVL you have one quarter of the original. So the remaining radiation is 25% of the initial amount. The other options correspond to only one HVL (50%), no shielding (100%), or an incorrect interpretation (75% remaining).

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