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Articles on Quantum mechanics

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Lasers create colorful light shows at concerts, are used by doctors in surgeries – and are used in scientific laboratories. EyeWolf/Getty Images

What is the slowest thing on Earth?

Physicists can use bright, hot lasers to slow atoms down so much that they measure -459 degrees Fahrenheit.
The crests (bright) and troughs (dark) of waves spread out after they were produced. The picture applies to both light and sound waves. Titima Ongkantong

A new type of laser uses sound waves to help to detect weak forces

Most people are familiar with lasers. But what about a laser made with sound rather than light? A couple of physicists have now created one that they plan to use for measuring imperceivable forces.

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