Solve this multiple-choice question and choose the correct option.

Applied X-ray detection: Which of the following items is particularly amenable to detection by <em>soft</em> X-rays (lower energy, higher absorption by light elements)? Consider penetration and contrast for organic materials. Choose the correct option.

Difficulty: Easy

Contrabands (general)
Lead in bullets
Narcotics
Genuine coins from counterfeit coins

Correct Answer: Narcotics

Explanation:

Concept/ApproachSoft X-rays (lower energy) are strongly absorbed by low-Z, organic materials, giving contrast useful for detecting items like narcotics. High-Z materials (lead bullets) require harder X-rays. Coin authentication typically relies on density/composition methods not specific to soft X-rays.

Final AnswerNarcotics

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