The applicability of these rules is based on an emission unit's "potential to emit
," or estimated emissions assuming that the unit is running at its maximum capacity constantly throughout the year (8760 hr).
* In a "Serious" air-pollution region, you're a major" polluter if you emit
only 50 TPY, and you have nine years to clean up your act."
For any given temperature and wavelength, it specifies exactly how much radiation an idealized thermal source known as a black body will emit
. Because a black body is considered the most efficient heat emitter possible, there should be no going beyond the emissions predicted by Planck's law.
When excited by laser beams entering from outside the cavity, the atom initially emits
Studies conducted during the past 40 years by many research groups demonstrate that at high temperatures, the polymer can emit
airborne poisons, an environmental group reported in a self-published review last week.
When electrons drop into those middle levels, they emit
photons with less energy, and therefore longer wavelengths, than usual.
The stack emits
a laser beam because many electrons forced into those wells by the high voltage carry more energy than the wells can accept.
Iron also emits
X rays at the slightly lower energy of 6,400 electron-volts.
What sets the new LED apart is that it consistently emits
a single photon of light in response to a single tiny electrical pulse.
As it spirals inward and crashes onto the star's surface, the gas heats up and emits
a torrent of high-energy radiation, mostly X rays.
At the heart of the novel, almost entirely plastic device is a material called poly(p-phenylenevinylene), or PPV, which emits
green light when stimulated with electricity (SN: 8/24/96, p.
It underwent a smaller burst 50 years later, and in late 1997 showed an unprecedented upswing in the intensity of X rays it emits
(SN: 2/7/98, p.
If a critical number of photon circuits arises in a patch of grainy film, it emits
A wild variety of cotton emits
"huge bouquets, or plumes, of these signals," says Tumlinson.
According to the standard theory of black hole dynamics, gas ripped from surrounding stars emits
a last gasp as it spirals into the black hole.