35.0 MB (899.8 KB compressed)
3910 x 3128 pixels
33.0 x 26.4 cm ⏐ 13.0 x 10.4 in (300dpi)
GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Light-emitting diode (LED) X-ray. This is a semiconductor that emits light when a current passes through it. LEDs are used extensively in lighting and for electrical devices and circuit boards to indicate the presence of a voltage.
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