Electromagnetic spectrum
hideThe electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.
The electromagnetic spectrum extends from below frequencies used for modern radio through to gamma radiation at the short-wavelength end, covering wavelengths from thousands of kilometers down to a fraction of the size of an atom. The long wavelength limit is the size of the universe itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length, although in principle the spectrum is infinite and continuous.
For more information about Electromagnetic spectrum, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with electromagnetic spectrum
Astronomers seek to explore the cosmic Dark Ages
Oct 15, 2009 |
4.9 / 5 (9) |
1
No place seems safe from the prying eyes of inquisitive astronomers. They've traced the evolution of the universe back to the "Big Bang," the theoretical birth of the cosmos 13.7 billion years ago, but there's still a long ...
Fermi Large Area Telescope Reveals Pulsing Gamma-Ray Sources
Sep 22, 2009 |
4.7 / 5 (6) |
1
(PhysOrg.com) -- Scientists at the Naval Research Laboratory Space Science Division and a team of international researchers have positively identified cosmic sources of gamma-ray emissions through the discovery ...
Sharing the air
Sep 22, 2009 |
4 / 5 (8) |
0
(PhysOrg.com) -- In the old days, when a new wireless technology came along, it got its own swath of the electromagnetic spectrum: AM radio uses 535 to 1,605 kilohertz, so television got chunks between 54 ...
Fermi Large Area Telescope reveals pulsing gamma-ray sources
Sep 09, 2009 |
4.6 / 5 (12) |
9
Scientists at the Naval Research Laboratory (NRL) Space Science Division and a team of international researchers have positively identified cosmic sources of gamma-ray emissions through the discovery of 16 ...
High in Sodium: Highly Charged Tungsten Ions May Diagnose Fusion Energy Reactors
Sep 08, 2009 |
4.3 / 5 (7) |
0
(PhysOrg.com) -- Just as health-food manufacturers work on developing the best possible sodium substitutes for low-salt diets, physicists at the National Institute of Standards and Technology have acquired ...
NASA Approves X-ray Space Mission
Space & Earth / Space Exploration
Sep 07, 2009 |
4.8 / 5 (5) |
0
NASA recently confirmed that the Nuclear Spectroscopic Telescope Array, or NuSTAR, mission will launch in August 2011.
UK scientists developing intelligent harvesting robot
Aug 11, 2009 |
4.5 / 5 (2) |
0
Researchers at the National Physical Laboratory (NPL) in Teddington have developed imaging technology to be used in an intelligent harvesting machine that could minimise wastage and solve an impending labour shortage for ...
'Look Mom No Electricity': Transmitting Information with Chemistry
Chemistry / Analytical Chemistry
Jun 19, 2009 |
4 / 5 (13) |
19
(PhysOrg.com) -- While information technology is generally thought to require electrons or photons for transmitting information, scientists have recently demonstrated a third method of transmission: chemical ...
ESA to launch two large observatories to look deep into space and time
Space & Earth / Space Exploration
May 07, 2009 |
4 / 5 (1) |
0
(PhysOrg.com) -- Two of the most sophisticated astronomical spacecraft ever built - Herschel and Planck - will be launched by ESA this month towards deep space orbits around a special observation point beyond ...
Michigan Astronomer to Search in Space for Precursors of Life
Apr 30, 2009 |
4.6 / 5 (5) |
0
Many of the organic molecules that make up life on Earth have also been found in space. A University of Michigan astronomer will use the Herschel Space Observatory to study these chemical compounds in new ...
HARPS-NEF to comb Kepler targets for new Earths
Apr 20, 2009 |
4 / 5 (5) |
0
Astronomers have announced plans to build an ultra-stable, high-precision spectrograph for the Science and Technology Facilities Council's 4.2-m William Herschel Telescope (WHT - part of the Isaac Newton Group ...
Team develops new metamaterial device
Feb 24, 2009 |
4.7 / 5 (6) |
0
An engineered metamaterial proved it can function as a state-of-the-art device in the complex terahertz range of the electromagnetic spectrum, setting a standard of performance for modulating tiny waves of radiation, according ...
