A new type of laser uses sound waves to help to detect weak forces
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May 17, 2019
(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.)
(THE CONVERSATION) Most people are familiar with optical lasers through their experience with laser pointers. But what about a laser made from sound waves?
What makes optical laser light different from a light bulb or the sun is that all the light waves emerging from it are moving in the same direction and are pretty much in perfect step with each other. This is why the beam coming out of the laser pointer does not spread out in all directions.
In contrast, rays from the sun and li...
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