How many HVLs are contained in 18 mm of shielding if the HVL is 2 mm?

Prepare for the RTBC X-ray Production and Safety Test. Study with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam and ensure your understanding of X-ray production and safety protocols!

Multiple Choice

How many HVLs are contained in 18 mm of shielding if the HVL is 2 mm?

Explanation:
Each HVL halves the radiation, so the number of HVLs in a given thickness is found by dividing the thickness by the HVL value. Here, 18 mm of shielding with an HVL of 2 mm gives 18 ÷ 2 = nine HVLs. So the shielding corresponds to nine half-value layers, meaning the beam is attenuated by a factor of 2^9.

Each HVL halves the radiation, so the number of HVLs in a given thickness is found by dividing the thickness by the HVL value. Here, 18 mm of shielding with an HVL of 2 mm gives 18 ÷ 2 = nine HVLs. So the shielding corresponds to nine half-value layers, meaning the beam is attenuated by a factor of 2^9.

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