Reflectivity range
Encyclopedia
Reflectivity range is the term used in X-ray reflectometry and several other radar
Radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...

-related or emission related sciences to describe the range at which reflected emissions become indecipherable due to the reflection angle and/or range.
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