50.3 MB (50.0 MB compressed)
5138 x 3425 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
PAN XUNBIN / SCIENCE PHOTO LIBRARY PAN XUNBIN / SCIENCE PHOTO LIBRARY
Scanning electron microscope. Computer artwork of a scanning electron microscope (SEM) with an abstract background. An SEM uses an electron beam to obtain a three-dimensional image of an object at magnifications much higher than can be obtained using light waves. The beam is scanned over the sample in a vacuum, causing the emission of secondary electrons. These secondary electrons are detected and used to form the image, which is displayed on a screen.
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