Cardiology

Ultrasound-assisted laser technique vaporizes artery plaque

Atherosclerosis, a buildup of plaque, can lead to heart disease, artery disease, and chronic kidney disease and is traditionally treated by inserting and inflating a balloon to expand the artery. Other treatments based on ...

Dentistry

Tiny bots that can deep clean teeth

Nano-sized robots manipulated using a magnetic field can help kill bacteria deep inside dentinal tubules and boost the success of root canal treatments, a new study by researchers at the Indian Institute of Science (IISc) ...

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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