Sentences with phrase «use radiation emitted»

Instead of relying on light waves emitted by electrons, it would use radiation emitted when the nucleus is excited to a high energy state, and then drops into a lower energy state.

Not exact matches

The gamma radiation emitted in the decay of its excited states was detected using the gamma ray spectrometer DALI2.

The researchers observed FRB 150807 while monitoring a nearby pulsar — a rotating neutron star that emits a beam of radio waves and other electromagnetic radiation — in our galaxy using the Parkes radio telescope in Australia.

And, aside from using high voltage and emitting low - level radiation, the machine has been deemed harmless.

Radioisotopes are injected and the radiation emitted is used to create 2D images.

By taking the change in the black hole's spin, and her half of the Hawking radiation that is emitted after she drops the qubit, Alice can use the rules of quantum teleportation to work out the spin of the qubit she dropped into the black hole — and hence retrieve information from beyond the black hole's event horizon.

They then took a closer look at the spectrum of radiation emitted by each of these objects, using optical telescopes in Arizona and the world's largest radio telescope, the 305 - metre dish at Arecibo in Puerto Rico.

But in the 1970s, Stephen Hawking used quantum mechanics to show black holes do emit radiation, which eventually evaporates them away completely.

Since Lew Snyder and David Buhl discovered interstellar formaldehyde in 1969, astronomers have identified more than 150 molecules in deep space, mostly by using radio telescopes to detect the faint radiation the molecules emit.

His idea was to use the High - Altitude Water Cherenkov observatory — made up of 300 water tanks on a Mexican mountaintop — to detect gamma radiation produced when charged particles emitted by pulsars interact with the gas between stars.

Marois and his team used ground - based infrared detection to seek out exoplanets around nearby, young, massive stars — those whose planets would have wide orbits and emit significant amounts of radiation as they cool from their relatively recent births millions of years ago.

The same may be required of some of the equipment used in drilling, which can eventually emit much higher levels of radiation than the water itself.

This quantum thermometer could be used to test whether black holes emit small amounts of radiation, as predicted by quantum theory.

This hot dust forms a ring around the supermassive black hole and emits infrared radiation, which the researchers used as the ruler.

Moreover the radiation from the greenhouse gases is calculated using Planck's function for blackbody radiation, but greenhouse gas molecules emit lines, not contiuous radiation.

The researchers hope to use Hubble for further observations of J0925 and other galaxies that could be emitting radiation.

Astronomers are able to use radio telescopes to detect the characteristic 21 - centimeter radiation emitted naturally by neutral atomic hydrogen.

Direct imaging can be done by using starlight reflected off the planet or thermal infrared radiation emitted by the planet.

However, even when many dark celestial bodies emit radiation, the emission may be observed just as «cosmic background» radiation if the sensitivity and resolution of the telescope in use is insufficient.

SESAME, which stands for Synchrotron - light for Experimental Science and Applications in the Middle East, is a light - source; a particle accelerator - based facility that uses electromagnetic radiation emitted by circulating electron beams to study a range of properties of matter.

The researchers used satellites to measure heat in the form of microwave radiation emitted by oxygen molecules in the atmosphere from 1979 to 2005.

It has been suggested by some vitamin D researchers, for example, that approximately 5 — 30 minutes of sun exposure between 10 AM and 3 PM at least twice a week to the face, arms, legs, or back without sunscreen usually lead to sufficient vitamin D synthesis and that the moderate use of commercial tanning beds that emit 2 % — 6 % UVB radiation is also effective [6,20].

Nuclear medicine scans involve injecting a short - acting radioactive agent into the patient, and images of the radiation emitted from the patient are recorded using a gamma camera.

Black tourmaline is a crystal used to diffuse the radiation emitted by laptops and hand - held devices.

Moreover the radiation from the greenhouse gases is calculated using Planck's function for blackbody radiation, but greenhouse gas molecules emit lines, not contiuous radiation.

T and sigma are standard nomenclature used in physics to discuss «black body radiation», i.e. the thermal radiation emitted by a body at temperature T.

I ask because my limited understanding is that temperature is related to kinetic energy, but would not register an overall increase in potential energy, in which case energy from the sun could be partitioned in heat energy emitted from the planet and work used to increase potential energy, possibly allowing an energy balance that does not require a radiation balance, and also does not require a warming effect.

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.

Only in computer models using the «external forcing» wheeze of a step change in emitted radiation at the top of the model atmosphere can these factors be regarded as forcing agents.

Much of our knowledge about the atmosphere is obtained from observing the radiation it emits, using satellites that orbit the earth in space.

From the above equation, the small change in global mean temperature (GMT) as a result of change in the radiation energy emitted by the globe may be calculated using the equation:

When this occurs, the difference between the infrared reflectance and the visible red reflectance, used in calculating NDVI, is smaller than it would be if the emitted radiation were intercepting vegetation.

If you used a parabolic mirror aimed at a warm wall to heat water you could heat it to the temperature of the wall then the heating stops because the object being heated, now at the same temperature as the heat source, emits back as much radiation as it receives.

All these technologies use the IR radiation emitted from the objects being scanned, at least according to all the various manufacturers I am familiar with.

Interestingly, the cardiac symptoms identified by parents in Simcoe County who re-ignited this whole debate are similar to symptoms that have recently been observed in a study of the use of Digital Enhanced Cordless Telecommunications (DECT) cordless phones, which emit continuous radiation as soon as they are plugged in.

But they had never developed metallurgy, or the use of electromagnetic radiation, so their civilization was «silent» since it emitted no signals into space.

Does Hitran simply use a plank distribution to determine the amount of emitted radiation and if so how does the model determine the temperature?

And using the argument further, the atmosphere can only loose heat by CO2 and water vapour emitting radiation in their respective bands.

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.