News tagged with laser light

Related topics: light , laser , electrons , molecules , atoms

Light assists in monitoring brain injuries

The information about alterations in cerebral perfusion is of crucial importance in treatment of patients with severe neurological injuries. The medical equipment used in clinics does not allow, however, ...

Aug 29, 2013
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New cancer imaging technology shows promise

(Medical Xpress)—A new imaging technology that combines ultrasound and laser technologies has been shown to be highly effective in identifying prostate cancer. The system, which was developed by University of Rochester ...

Jul 19, 2013
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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
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Want to get rid of that old tattoo? You're not alone

(HealthDay)—It seems that tattoos are everywhere these days, but along with the increase in people getting inked, the number of Americans undergoing procedures to have a tattoo removed is also on the rise, ...

Feb 09, 2013
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A light switch inside the brain

Activating and deactivating individual nerve cells in the brain is something many neuroscientists wish they could do, as it would help them to better understand how the brain works.

Jan 18, 2013
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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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