50.4 MB (50.0 MB compressed)
4843 x 3636 pixels
40.9 x 30.7 cm ⏐ 16.1 x 12.1 in (300dpi)
TONY MCCONNELL / SCIENCE PHOTO LIBRARY TONY MCCONNELL / SCIENCE PHOTO LIBRARY
Man's face, thermogram. A thermogram shows the variation in temperature on the surface of an object, measured by the long-wave infrared radiation it emits. The temperature scale is colour-coded and runs from purple (coldest), through blue, green, yellow and orange to red (warmest).
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