- X-BIS machines use dual-energy X-rays to differentiate between materials based on their atomic number (Zeff). - Different colours are assigned to different categories of materials: - Organic materials (low Zeff, e.g., paper, cloth, food, explosives, drugs) - often shown as orange/brown. - Mixed materials (medium Zeff, e.g., plastics, water) - often shown as green. - Inorganic materials (high Zeff, e.g., metals, glass) - often shown as blue/black.
Through the X-BIS Screen, explosives are seen in
Asked in UPSC CISF AC EXE 2017 · Topic: Nuclear, Biological, and Chemical Defence Technologies (Biological Agent Identification and Detection Systems)
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Answer: A. Orange colour
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