Sentences with phrase «of radiation heat»

People who do not understand the basics of radiation heat transfer fail to understand that the biggest negative feedback on warming is the emission of infrared radiation.

Bryan: The basic law of radiation heat transfer which denotes that the equilibrium temperature of a black body surface varies as the fourth root of the radiative energy it emits?

Honestly, I wasn't thinking of the radiation heating the atmosphere each time it got absorbed and re-emitted — since its not that kind of radiation.

Not exact matches

Its guidelines set maximum radiation exposure levels based on the amount of heat emitted by mobile phones.

Darin Toohey, a professor at the University of Colorado's atmospheric and oceanic sciences department and one of the paper's authors, says black carbon absorbs shortwave radiation from the sun, causing the atmosphere to heat up.

This means that computers could have the benefits of data delivered by light — high speeds, no heat caused by electronic resistance, and no interference from electromagnetic radiation — but would also be able to slow that data down enough so that computers chips could do something useful with it.

Leeches in a tropical forest sit on leaves and their front part waves about in the air like an antenna, extremely interested in infra - red radiation of heat.

Yep — body heat is another form of radiation!

The roasting process will firstly be described in theory regarding different principles of roasters, types of heat transfer (convection, contact, radiation) and their influences on the aroma development.

The heat radiates out from the element via thermal radiation and heats the walls of the oven and the surrounding air.

Their discovery of the cosmic microwave background radiation won them the Nobel Prize because the remnant heat showed that the universe must have begun with a violent explosion.

Heat from Earth's inner core, which is as hot as the surface of the sun, churns an outer core of molten iron and nickel, generating a magnetic field that deflects lethal cosmic and solar radiation away from the planet.

Taken with the orbiting Chandra Observatory, it shows the hottest, most violent objects in the galaxy: black holes gobbling down matter, gas heated to millions of degrees by dense, whirling neutron stars, and the high - energy radiation from stars that have exploded, sending out vast amounts of material that slam into surrounding gas, creating shock waves that heat the gas tremendously, generating X-rays.

Modifying the vegetation cover alters the surface properties — such as the amount of heat dissipated by water evaporation and the level of radiation reflected back into space — which has a knock - on effect on local surface temperature.

Astronomers long considered two other main candidates in addition to synchrotron radiation: black - body radiation, which results from the emission of heat from an object, and inverse Compton radiation, which results when an accelerated particle transfers energy to a photon.

Inside the greenhouse the visible light is absorbed by the plants and soil and is converted into heat, which is then emitted by the plants and soil in form of infrared radiation.

Incredible as it may seem, heat radiation is the greatest source of uncertainty when projecting which asteroids could hit Earth in the far future.

«Each of these factors influences incoming solar radiation and how Earth is absorbing heat,» Garzione says.

In an ideal SRM geoengineering scenario, even as humans warm the Earth by releasing increasing amounts of heat - trapping gases, that warmth would be counterbalanced, since more heat - causing radiation would also be reflected.

Finally, the film of electrons would absorb the radiation and reemit it as heat.

Friction in the disc heats up the material, causing it to release vast amounts of radiation, which telescopes can detect.

When a giant star explodes as a supernova, it can outshine its own galaxy as it dishes out heat, X-rays, and the highest - energy radiation of all, gamma rays.

The infalling gas heats up and emits intense radiation, some of which makes its way to Earth.

It creates a much greater blast effect than infrared radiation, or heat — which was the primary means of destruction from the bombs we dropped on Hiroshima and Nagasaki.

While lower - energy ultraviolet radiation breaks up water molecules — a process called photodissociation — ultraviolet rays with more energy (XUV radiation) and X-rays heat the upper atmosphere of a planet, which allows the products of photodissociation, hydrogen and oxygen, to escape.

«With this in mind, we hope our work can support the development of energy - efficient devices that can function in conditions of extreme heat or radiation.»

A large shield blocks out solar radiation, and the telescope orbits millions of miles from Earth's heat.

By observing the combined infrared radiation of star and planet with Spitzer and then subtracting the radiation recorded from the star alone when it hid the planet, Deming and Charbonneau had detected the heat of the planet itself.

Cell phone radiation falls into the same band of nonionizing radio frequency as microwaves used to heat or cook food.

«Sunlight is a mixture of electromagnetic radiation made up of near - UV rays, visible light, and infrared energy, or heat,» said Yueh - Lin (Lynn) Loo, director of the Andlinger Center for Energy and the Environment, and the Theodora D.»78 and William H. Walton III»74 Professor in Engineering.

The radiation is harmful mostly to the parts of the body that can not conduct the heat away very effectively — the eyes especially.

Asteroid surfaces heat up during the day (as illustrated by this image) and cool down at night, giving off radiation that can act as a sort of mini-thruster.

When the researchers placed the lattice in a vacuum heated to 1,250 degrees Celsius, they found that it converted radiation with an efficiency of 34 percent and emitted about 14 watts per square centimeter.

Having a mass of only less than seven per cent of the mass of the Sun, they are unable to create sufficient pressure and heat in their interiors to ignite hydrogen - to - helium fusion, a fundamental physical mechanism by which stars generate radiation.

The key is the spore: a bacterial spore, or tough shell, forms in response to harsh environmental conditions such as heat, cold, radiation or the presence of toxic substances such as gold.

Superior is also warming because of a decline in cloud cover over the Great Lakes in recent years; more heat from solar radiation hits the lakes, Lenters said at a limnology meeting in Honolulu in March.

Martin Cooper of the National Museums and Galleries on Merseyside uses short pulses of infrared radiation to heat up the dirt on a sculpture and either vaporise it or loosen the bonds so that the dirt falls off (This Week, 8 April).

Instead of dissipating into space, the infrared radiation that is absorbed by atmospheric water vapor or carbon dioxide produces heating, which in turn makes the earths surface warmer.

Although the concentration of carbon dioxide in the atmosphere is much higher, at around 385 parts per million, methane is a worry as it is much better than carbon dioxide at locking in heat from solar radiation.

Cloudy, humid days reverse the cooling from both radiation and sublimation — cloud cover prevents snow from emitting energy, and condensation of water vapor on the snow releases latent heat, warming the snow.

The visible solar radiation mostly heats the surface, not the atmosphere, whereas most of the infrared radiation escaping to space is emitted from the upper atmosphere, not the surface.

Vegetation growth enhances heat transfer and increases the height of Earth's boundary layer, the lowest part of the atmosphere that is highly responsive to surface radiation.

The higher it is, the more intense the radiation is, just like a hot bar of metal emits much more heat than a cold one.

Black carbon absorbs a wide spectrum of light radiation, so a little soot retains a lot of heat.

Using their computer models as a guide, the researchers found a variant of polyethylene commonly used in battery making that has a specific nanostructure that is opaque to visible light yet is transparent to infrared radiation, which could let body heat escape.

At low altitudes, about half the energy of such a bomb is released in the air blast, 35 percent as heat and 15 percent as nuclear radiation.

Secondly, the design leads to small — aperture vacuum chambers that result in low vacuum conductance and the need for distributed pumping as well as for the distributed absorption of heat deposited by the synchrotron radiation.

The radio jets compress clouds of gas along their path and heat up water molecules contained within the clouds until they emit radiation.

«Forty to 60 percent of our body heat is dissipated as infrared radiation when we are sitting in an office,» said Shanhui Fan, co-author of the study and a professor of electrical engineering who specializes in photonics, which is the study of visible and invisible light.

By assessing the levels of radiation at the site and measuring the radiation response in the tools, McPherron and his colleagues established that the tools were heated between 280,000 and 350,000 years ago.