Photon

...of photons. Various other groups have shown similar effects. Many cells seems to produce optical and UV photons at about 10 photons per square cm/s, a rate that cannot be explained by ordinary thermodynamic emissions. Other evidence...

In this article: Uranium, Arxiv, Coal, Electron, Climate change, Lebedev Institute of Physics, Rush University Medical Center, and Chicago

...the article "Are cell phones, grid the next cigarettes?" (Open Forum, Nov. 18). Here are the facts, using basic 10th grade science: Photons induce cancer by the photoelectric effect, breaking chemical bonds and creating mutant strands...

In this article: Cancer, Breast cancer, Barack Obama, Best interests, Waste, Climate change, Global warming, and Surgery

...same way: Excite certain kinds of atoms, and light particles - photons - radiate out. Reflect that light back into the excited atoms, and more photons appear. But performance varies wildly, depending on the kind of "gain medium" - the type of...

In this article: Darpa, Textron, General Atomics, Waste heat, Crystal, B-1B bomber, Ac-130 Gunship, Wired.com, and The U.S. Air Force

...which means that no electricity can flow from one of the metal legs to the other. However, when light (photons) hit the surface of the semiconductor, they knock electrons free, and allow some current to flow across the semiconductor. To make...

In this article: Semiconductor, Insulator, Cadmium sulfide, and Electron

Alan describes how this was demonstrated in a simple experiment using a laser and a special camera. A single wave of light, a photon, passes through two slits at the same time and creates an interference pattern. A simple experiment in...

In this article: Alan Davies, Quantum mechanics, Horizon, Seth Lloyd, QI, Atom, TV Documentary, Sugar, and MIT

...studied the clusters' motion in the "afterglow" of the big bang, as measured by the Wilkinson Microwave Anisotropy Probe (WMAP). The photons of this afterglow collide with electrons in galaxy clusters as they travel across space to the Earth,...

In this article: Big Bang, Wilkinson Microwave Anisotropy Probe, Electron, University of North Carolina, Chapel Hill, and Greenbelt

...some super battery in there to be able to hold all that energy that's used to create the phaser that they show." Photon torpedoes Photon torpedoes in "Star Trek" are made out of matter and antimatter with a force field in the middle.

In this article: Star Trek, Time travel, IP Address, Speed of light, DVD, and Hollywood

...emerged: Hegemann and his colleagues found that part of the cell's membrane is packed with coiled-up proteins. They theorized that when a photon hits one of those proteins, the molecule uncoils, creating a tiny pore in the membrane. Charged...

In this article: E mail, Seizure, Muscle weakness, Scientific American, Stanford, IKEA, and Francis Crick

...sails are theorized as a way to achieve long-duration interstellar flight. A solar sail would be propelled by the pressure of light - photons pushing against a surface - not the stream of ionized gas known as the solar wind. The...

In this article: Planetary Society, The Planetary Society, Carl Sagan, Bruce Murray, San Luis Obispo, and Washington, D.C.

Washington, October 29 : Two gamma-ray photons that raced across the Universe for the last 7.3 billion years to arrive at NASA's orbiting Fermi Gamma-ray Space Telescope within nine-tenths of a second of one another have given scientists...

In this article: Albert Einstein, Einstein, Physics, Speed of light, Electron, Stanford University, NASA, and Washington