News tagged with laser

Related topics: light , laser beam , atoms , wavelength , nature photonics

Japan tooth patch could be end of decay

Scientists in Japan have created a microscopically thin film that can coat individual teeth to prevent decay or to make them appear whiter, the chief researcher said.

Sep 16, 2012
popularity 4.6 / 5 (46) | comments 15

Laser treatment can make your brown eyes blue

Just like the old Crystal Gayle song, a new laser technology could soon allow you to turn those boring brown eyes of your to a rich and beautiful blue. But you better make sure that blue eyes are what you really want because ...

Nov 04, 2011
popularity 4 / 5 (11) | comments 21 | with audio podcast report

Researchers develop laser technology to fight cancer

Researchers at the Center for Laser Applications at the University of Tennessee Space Institute in Tullahoma have developed a technology that goes on a "seek and destroy" mission for cancerous tumors. They have harnessed ...

Jul 23, 2012
popularity 4.8 / 5 (5) | comments 0 | with audio podcast

Guard your good vision, experts say

(HealthDay)—Smoking, decorative contact lenses and laser pointers all pose a threat to your eyes, but sitting too close to the television or computer screen doesn't, the U.S. Food and Drug Administration ...

May 23, 2014
popularity 4.6 / 5 (5) | comments 0

A second look at glaucoma surgery

New research led by Queen's University professor Robert Campbell (Ophthalmology) has revealed using anti-inflammatory medications after glaucoma laser surgery is not helpful or necessary.

Sep 18, 2014
popularity 2.9 / 5 (8) | comments 0

Nanosurgery and the fight against cancer

Researchers at Polytechnique Montreal have succeeded in changing the genetic material of cancer cells using a brand-new transfection method. This major breakthrough in nanosurgery opens the door to new medical applications, ...

Feb 16, 2012
popularity 5 / 5 (3) | comments 0

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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