Latest Photon Stories

2012-04-02 09:25:53

A research team led by University of Toronto Professor Hoi-Kwong Lo has found a new quantum encryption method to foil even the most sophisticated hackers.

2012-03-29 02:31:56

A team of physicists at UC Santa Barbara has seen the light, and it comes in many different colors.

2012-03-05 22:49:56

For almost fifteen years Professor Nicolas Gisin and his physicist col- laborators have been entangling photons.

One More Victory Scored Over Uncertainty In Quantum Physics Measurements
2012-02-27 05:56:47

For scientists working in quantum physics, the Heisenberg Uncertainty Principle says that measurements of properties such as the momentum of an object and its exact position cannot be simultaneously specified with arbitrary accuracy.

2012-02-16 11:01:08

Ghost imaging (GI), and its even more oddly named cousin virtual ghost imaging (VGI), seem to contradict conventional wisdom by being able to image an object by simply counting photons in a "light bucket."

2012-02-09 10:43:02

At the high-brilliance synchrotron light source PETRA III, a team of DESY scientists headed by Dr. Ralf Röhlsberger has succeeded in making atomic nuclei transparent with the help of X-ray light.

2012-01-31 06:17:48

In a flash, the world changed for Tim Noe – and for physicists who study what they call many-body problems.

Device Measures Glucose In Saliva
2012-01-24 05:11:32

Engineers at Brown University have designed a biological device that can measure glucose concentrations in human saliva. The technique could eliminate the need for diabetics to draw blood to check their glucose levels.

2011-12-21 14:47:21

Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a prototype device capable of absolute measurements of optical power delivered through an optical fiber.

Latest Photon Reference Libraries

2004-10-19 04:45:41

Electromagnetic Spectrum -- The electromagnetic spectrum describes the various types of electromagnetic radiation based on their wavelengths. Radio, representing wavelengths from a few feet to well over a mile, is at one end of the spectrum. Gamma ray radiation is at the other end: the wavelength of the harder types is so short, in the subatomic range, that we do not have instruments capable of directly measuring it. While the above classification scheme is generally accurate, in...

2004-10-19 04:45:41

Electromagnetic Radiation -- Electromagnetic radiation is a combination of oscillating electric and magnetic fields propagating through space and carrying energy from one place to another. Light is a form of electromagnetic radiation. The theoretical study of electromagnetic radiation is called electrodynamics, a subfield of electromagnetism. When any wire (or other conducting object such as an antenna) conducts alternating current, electromagnetic radiation is propagated at the same...

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Word of the Day
  • A volcanic mudflow.
The word 'lahar' comes from Javanese.