TSA CBT Practice Test

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What do lighter colored items indicate in X-Ray analysis?

  1. They are denser materials

  2. They are less dense materials

  3. They are dangerous materials

  4. They are metallic items

The correct answer is: They are less dense materials

Lighter colored items in X-Ray analysis typically indicate less dense materials. In X-Ray imaging, different materials attenuate X-Rays to varying degrees based on their density and atomic composition. Denser materials, such as metals, absorb more X-Rays and appear darker on the screen. Conversely, less dense materials allow more X-Rays to pass through them, resulting in a lighter appearance in the X-Ray image. Materials such as plastics, organic materials, and certain fabrics often show up as lighter colors in X-Ray analysis due to their lower density. This distinction helps authorities effectively identify and screen items for security purposes.

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