News tagged with laser
Related topics: light , laser beam , atoms , wavelength , nature photonics
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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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 ...
Medical research May 20, 2013 | not rated yet | 0 |
When Dexter the cocker spaniel tore a ligament in his hind leg a few weeks ago, he didn't suffer in silence. Instead, his owner blogged about.
Cancer May 17, 2013 | not rated yet | 0
A different view of cancer cells: New study measures physical changes in tumor cells as they become metastatic
Most cancer deaths are caused by metastatic tumors, which break free from the original cancer site and spread throughout the body. For that to happen, cancer cells must undergo many genetic and physical changes.
Cancer Apr 23, 2013 | not rated yet | 0 |
A Case Western Reserve University student-led startup aimed at saving lives through faster, better and cheaper malaria diagnosis won the 2013 LaunchTown Entrepreneurship Business Idea Competition at the University of Akron ...
Diseases, Conditions, Syndromes Apr 23, 2013 | not rated yet | 0