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Home»Science»Laser technique measures vast distances with nanometre precision
Science

Laser technique measures vast distances with nanometre precision

January 13, 2025No Comments1 Min Read
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Laser beams in a physics laboratory

Callum Fraser / Alamy Stock Photo

A new way of measuring distance using lasers can measure lengths of more than 100 kilometers within a thousandth of the width of a human hair, and could be used to make better telescopes in space.

In laboratory settings, scientists can use lasers to measure distances with extreme precision, down to a few nanometers. But for longer distances of a kilometer or more, the accuracy of these techniques tends to be much lower, within a millimeter.



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