Sentences with phrase «radiation emitted by»

Rather it blocks cellular radiation emitted by your phone.

It may sound like a gimmick, but the Pong case has actually been tested and verified to cut down on the amount of radiation emitted by phones.

October 15, 2009 — Cedars - Sinai Medical Center in Los Angeles, California admitted Monday that a mistake in default settings on a CT scanner used to perform brain scans on patients resulted in an increase in the amount of radiation emitted by the machine.

The problem is that you're not calculating the specific radiation emitted by a curved surface facing to the Earth, but the whole amount the Sun emits in one second, not towards the Earth, but towards the whole outer sphere > / b >.

Consider the black curve in your diagram, which represents the distribution of LW radiation emitted by a surface at 210 degrees Kelvin, or -63 C.

Thermal radiation emitted by the Earth also varies by day and night, season, local cloud cover that blocks Sunlight, local albedo, and other factors.

This NASA site (not GISS: ^) http://earthobservatory.nasa.gov/Features/Clouds/, is about clouds and says, in part: «When a cloud absorbs longwave radiation emitted by the Earth's surface, the cloud reemits a portion of the energy to outer space and a portion back toward the surface.»

Clouds also produce a warming effect by absorbing some of the infrared heat radiation emitted by the ground.

«The infrared radiation emitted by the surface e * s * T4 is strongly absorbed by water vapor and carbon dioxide in the atmosphere.

It will be convenient here to define the term radiative exchange equilibrium between two specified regions of space (or bodies) as meaning that for the two regions (or bodies) A and B, the rate of flow of radiation emitted by A and absorbed by B is equal to the rate of flow the other way, regardless of other forms of transport that may be occurring.

Amongst other things you will find: «The infrared radiation emitted by the surface e * s * T4 is strongly absorbed by water vapor and carbon dioxide in the atmosphere.

That is determined by consideration of the absorption of the atmosphere of terrestrial radiation (and radiation emitted by the atmosphere), which essentially ends up determining at what altitude the temperature has to be determined via radiative balance between the Earth system (earth + atmosphere) and the sun and space [which for the earth system with its current albedo is ~ 255 K].

One of these is whether radiation emitted by a colder object is actually absorbed by a warmer object (and thereby increasing the radiation that the warmer object thereby emits).

CO2 absorbs infrared emissions from the Earth's surface only minimally in the range 7 to 13μm and it is within this range where the greatest proportion of radiation emitted by the Earth is found.

Hawking conceded when sufficiently convincing mathematics showed that the information in the enclopedia would reemerge as patterns in so - called Hawking radiation emitted by the blackhole.

In the troposphere, CO2 is optically thick and traps infrared radiation emitted by the Earth's surface.

Greenhouse Gas (GHG)- Geenhouse gases are those gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth's surface, the atmosphere itself, and by clouds.

Greenhouse gases allow much of the Sun's shortwave radiation to pass through them but absorb or trap the longwave, infrared radiation emitted by the Earth's surface.

However, clouds also trap longwave radiation emitted by the Earth, as does water vapor.

What the post was questioning was the assumption that the radiation emitted by the shell is distributed in equal portions inwards and outwards.

However, radiation emitted by a molecule within a solid will generally be absorbed by the immediately neighboring molecules: it doesn't get very far.

And because of the larger area of the shell (it's radius is greater than that of the earth), for the radiation emitted by the shell to be maintained at the same Watts / square meter, the «Net Power» of the shell would then be greater than what the earth's was alone.

There seems to be no end of people who can't tell the difference between the radiation emitted by a surface, and the net exchange between two surfaces.

In a stationary state the troposphere is cooled from the top by IR radiation emitted by the top layers of troposphere upwards leading to heat loss to the space.

In fact, contrails are believed to contribute to global warming by trapping radiation emitted by the Earth.

[1] Greenhouse gases, which include water vapor, carbon dioxide and methane, warm the atmosphere by efficiently absorbing thermal infrared radiation emitted by the Earth's surface, by the atmosphere itself, and by clouds.

These gases absorb infrared radiation emitted by Earth and release that energy into the atmosphere rather than allowing it to escape to space.

Temperatures aloft can be measured in a number of ways, two of which are useful for climate monitoring: by radiosondes (balloon - borne instrument packages, including thermometers, released daily or twice daily at a network of observing stations throughout the world), and by satellite measurements of microwave radiation emitted by oxygen gas in the lower to mid-troposphere, taken with an instrument known as the Microwave Sounding Unit (MSU).5 The balloon measurements are taken at the same Greenwich mean times each day, whereas the times of day of the satellite measurements for a given location drift slowly with changes in the satellite orbits.

From what we know about the distribution of energy in the spectrum of the radiation emitted by a body at 55 o, it is clear that the rock - salt plate is capable of transmitting practically all of it, while the glass plate stops it entirely.

Note 2 — This assumes there is some «view factor» between the two bodies — that is, some portion of the radiation emitted by one body can «hit» the other.

Turgid undergraduate books about heat transfer in university libraries all write that radiation emitted by a colder body is absorbed by a hotter body.

For example, UV radiation is all absorbed in the stratosphere, such that notable stratospheric changes arise with changes to the non-thermal radiation emitted by the sun.

Very little of the radiation emitted by Earth's surface passes directly through the atmosphere.

At the temperature the atmosphere is, it radiates infrared so this radiation interacts with the atmospheric matter exactly in the same way as the radiation emitted by the ground does.

Also contributing to the warmer urban atmosphere is the blanket of pollutants and water vapour that absorbs a portion of the thermal radiation emitted by the Earth's surface.

F.ex if the spontaneous emission was the dominating process, you would see about half of the 15µ radiation emitted by the ground going up (the spontaneous emission being isotropic, half of the emission goes up and half goes down).

Is this supposed to «prove» that visible light can not be absorbed by the earth, and hence can not be implicated in the radiation emitted by the earth and absorbed by greenhouse gasses?

Because the climate system derives virtually all its energy from the Sun, zero balance implies that, globally, the amount of incoming solar radiation on average must be equal to the sum of the outgoing reflected solar radiation and the outgoing thermal infrared radiation emitted by the climate system.

«Carbon dioxide absorbs in the atmospheric «window» from 7 to 14 micrometers which transmits thermal radiation emitted by the earth's surface and lower atmosphere.

Infrared radiation emitted by the earth's surface is not trapped.

A satellite map of the outgoing longwave radiation emitted by Earth in September 2008 demonstrates not only geographical variations but also those caused by cloud presence.

But most of the infra - red radiation emitted by the earth's surface is absorbed in the atmosphere by water vapour, carbon dioxide, and other naturally occurring «greenhouse gases», making it difficult for the surface to radiate energy directly to space.

As Maxwell clearly states: Maxwell: «it follows that if two bodies have the same temperature the radiation emitted by the first and absorbed by the second is equal in amount to the radiation emitted by the second and absorbed by the first during the same time»

two regions (or bodies) A and B, the rate of flow of radiation emitted by A and absorbed by B is equal to the rate of flow the other way, regardless of other forms of (energy) transport that may be occurring.»

«Atmospheric greenhouse gases such as carbon dioxide can raise the temperature of the Earth's surface by absorbing some of the far - infrared radiation emitted by Earth and re - emitting it isotropically.»

You can think of a greenhouse gas as a form of albedo that operates on the infrared radiation emitted by the Earth.

Although the Oxygen, Nitrogen and Argon components are warmed by conduction and convection they do not absorb the long wave radiation emitted by the surface and by the atmosphere as a whole.

In equilibrium these would be balanced by upward transfer of infrared radiation emitted by the surface, by sensible heat flux (warm air carried upward) and by latent heat flux (i.e. evaporation — moisture carried upward).

So, here is my newbie question: Fig 1 shows earth receiving higher levels of infrared radiations from sun then the infrared radiation emitted by earth.

I have been looking at the GISS ModelE1 and it seems to me that the radiation emitted by each layer is being calculated using Planck's function for blackbody radiation.