Length measurement
Ways in which length, distance or range can be measured / From Wikipedia, the free encyclopedia
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"Range estimation" redirects here. Not to be confused with Interval estimation.
For broader coverage of this topic, see Dimensional measurement.
Length measurement, distance measurement, or range measurement (ranging) refers to the many ways in which length, distance, or range can be measured. The most commonly used approaches are the rulers, followed by transittime methods and the interferometer methods based upon the speed of light.
You can help expand this article with text translated from the corresponding article in German. (May 2021) Click [show] for important translation instructions.

For objects such as crystals and diffraction gratings, diffraction is used with Xrays and electron beams. Measurement techniques for threedimensional structures very small in every dimension use specialized instruments such as ion microscopy coupled with intensive computer modeling.