Medical research

Optical tweezers unveil a secret of muscle power

Our hearts beat a life long. With every beat our heart muscle contracts and expands. How this can work throughout an entire life remains largely a mystery. Researchers at the Technical University of Munich (TUM) have now ...

Health

Lasers in toys can cause serious eye damage, FDA warns

(HealthDay)—Lasers in toys can be dangerous to children and those around them, posing the risk of serious eye injuries and even blindness, according to the U.S. Food and Drug Administration.

Medical research

Can we use 3-D printing and stem cells to build a bone?

Pioneering techniques aiming to recreate human bone for replacement and repair will be showcased at the Royal Society's annual Summer Science Exhibition which opens to the public today.

Diseases, Conditions, Syndromes

A new method for more accurate assessment of osteoporosis

Laser-based measurements are proving to be a promising method for the assessment of osteoporosis. The team led by Professor Jussi Timonen has developed an ultrasound technique that use laser beams for a rapid and accurate ...

Medical research

A new approach to bladder-disease treatment

A bladder disease called interstitial cystitis affects at least a half-million people in the United States, mostly women, with perhaps an equal number undiagnosed. At present, there are no good options for such people; the ...

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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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