X-ray fluorescence (XRF) being used to measure metal contamination in farmland. The device works by irradiating samples using controlled x-rays, causing the sample to re-emit fluorescent, or secondary, x-rays. The energy of these fluorescent x-rays is unique to each different element, so chemical composition can be determined from the reading. Fluorescent x-ray radiation is measured in milliRoentgen per hour (mR/hr). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / US DEPARTMENT OF AGRICULTURE / Lance Cheung |
Bildgröße: | 7245 px × 4830 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |