News tagged with laser

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

1,440-nm laser beneficial for photodamage in Asians

(HealthDay)—Four treatments with 1,440-nm fractional laser produce mild improvement in select signs of photodamage in an Asian population, according to a study published March 14 in Lasers in Surgery an ...

Apr 10, 2014
popularity not rated yet | comments 0

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

Lymphatic fluid takes detour

When tumours metastasise, they can block lymphatic vessels, as researchers from ETH Zurich have discovered using a new method. The lymphatic fluid subsequently has to find a new path through the tissue. Such ...

May 20, 2013
popularity not rated yet | comments 0 | with audio podcast

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

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.

This text uses material from Wikipedia licensed under CC BY-SA