Sentences with phrase «because photons»

Since the radiation heading down is heading «back toward us» we call it «backradiation» (not because any photons are heading back where they came from).

Radiation at these wavelengths can not be radiated directly into space from the surface because these photons are easily absorbed by water and CO2 molecules.

Your bringing up photons is just obfuscation and a dodge because photons are not relevant to the question of thermal energy / heat transfer between the atmosphere and the earth's surface.

In the wavelengths where the atmosphere is opaque, the radiation field is almost isotropic, because photons are constantly absorbed and reemitted.

«Photons in all directions» is not an argument helping you, because photons are quantum physics and we don't use quantum physics for bulk properties of mass.

You know, if you shine a laser beam across a sunlit room, it gets to where it's going because the photons from the laser and sun do not interact with one another.

Because photons released into the atmosphere take energy with them, Miller said it was previously understood that greater photon emission meant less energy efficiency.

Because photons lack charge and mass, they can be transmitted across a fiber optic network with minimal interactions with other particles.

Because photons impart momentum, physicists were able to demonstrate the potential of light to supply a tiny wing's lift.

But because the photons are released with no preferred direction, the changes in momentum caused by the emission average to zero.

The returning light contains a lot of interesting information, Matousek explains, because photons lose energy when they strike the molecules in the sample, and in losing energy they also change color.

But because photons do not really interact with one another, it is challenging to transfer the «contents» of two photons into one.

And this happens not because the photons were both horizontally polarized from the beginning.

Many astronomers fear the additional mirror will degrade sensitivity, or the ability to see faint objects, because photons are lost with each reflection.

Because these photons are so old, the familiar two - dimensional map of the CMB is often called a «baby picture» of the universe, providing a window back into the primordial conditions that created the cosmos we see around us today.

Making single photons interact can be useful because a photon can carry the units of quantum information, called qubits.

We call it photonics because the photon is the smallest unit of light, like little bundles of energy that make up light.

Now the matching is just «almost perfect» if there is a temperature gradient, because the photon density must slowly decrease to match the local excitation temperature.

It's made of nothing but pine and mylar but should maintain an imbalance of temperatures between two objects forever, because photon transmission and reflection can be made to be asymmetrical or unidirectional by having mirrors moving to create a path that is only valid in one direction.

Not exact matches

We think of «eyesight» as this magical thing because it's pretty magical, yet all it is is the result of photons striking chemicals that are in physical structures within the retina and cause a nerve impulse.

In a few thousand years of recorded history, we went from dwelling in caves and mud huts and tee - pees, not understanding the natural world around us, or the broader universe, to being able to travel through space, using reason to ferret out the hidden secrets of how the world works, from physics to chemistry to biology, we worked out the tools and rules underpinning it all, mathematics, and now we can see objects that are almost impossibly small, the very tiniest building blocks of matter, (or at least we can examine them, even if you can't «see» them because you're using something other than your eyes and photons to view them) to the very farthest objects, the planets circling other, distant stars, that are in their own way, too small to see from here, like the atoms and parts of atoms themselves, detected indirectly, but indisputably THERE.

«The gas which forms the major part of the insterstellar medium,» explains Jorge García Rojas, a researcher at the IAC who is the first author on the paper «can be observed because its atoms are ionized by the photons emitted by the hot stars embedded inside it (which can either very massive stars, or white dwarfs, which are also very hot).

It was widely held that these effects would cancel each other out because of the many particles (such as photons, electrons, protons, and neutrons) that are typically involved.

For comparison, a conventional photovoltaic cell made of crystalline silicon turns nearly 20 percent of incoming photons to electricity, and lasts much longer because it is not as susceptible to corrosion by water vapor.

In a type of polarization state called circular polarization, the electric field of light rotates in a circle because of which the photons have spin angular momentum.

The first photon slips into a cloud of rubidium atoms, which were chosen because they can easily be cooled to the extreme point at which they are nearly motionless.

Physicists realize things are out of kilter because they can literally count the number of photons — particles of energy — in the universe today and compare that with the total number of matter particles.

Because neutrinos scarcely interact with matter, they should escape an exploding star almost immediately, while photons of light will take about 3 hours to get out.

The grains are light enough to be set spinning by collisions with photons and fast - moving atoms, and because some are charged this would cause them to emit microwave radiation.

In the quantum world, physicists study the tiny particles that make up our classical world — neutrons, electrons, photons — either one at a time or in small numbers because the behaviour of the particles is completely different on such a small scale.

That's because particles of light, or photons, are mostly antisocial — they don't interact with each other.

And because photonic chips shuttle photons instead of electrons, mobile devices such as smartphones or tablets built with this technology would consume less power, have longer battery life and generate less heat than existing mobile devices.

In the late 1990s, Arthur Nozik of the National Renewable Energy Laboratory in Golden, Colorado, and the University of Colorado, Boulder, theorized that if the semiconductors were made out of nanoparticles, they could excite multiple electrons with less photon energy, because less of the incoming energy would be sapped by vibrating atoms in the crystalline lattice.

Nanocrystals selectively infused, or «doped», with rare - earth ions have attracted the attention of researchers, because of their low toxicity and ability to convert low - energy laser light into violet - colored luminescence emissions — a process known as photon upconversion.

APDs detect photons because when a photon strikes the top surface of the chip, its energy knocks an electron into an energy level in which it can move around freely.

Because the coupling of atoms and photons is usually very weak, their behavior was extremely hard to observe, he said.

And just as we can regard radio emissions as waves and not as photons because of their long wavelength, the gravitational waves that we detected were of sufficiently long wavelength that we could indeed regard them as waves.

And he wouldn't notice the loss of pulses, as a lot of photons never make it from Alice to Bob anyway because of detector inefficiency.

He doubts that the effect has any practical use because it doesn't generate large numbers of photons, but he considers it a nice demonstration of quantum mechanics.

Now the photon can not follow both paths because gravity anchors the mirror to a single state.

«Because of the switching path differences between coherent and incoherent cavity photon densities reacting with collector voltage modulation via Feng - Holonyak intra-cavity photon - assisted tunneling resulting in the collector voltage difference in switch - UP and switch - DOWN operations, the transistor laser bistability is realizable, controllable and usable,» Feng said.

This interference arises because it is not possible, even in principle, to determine which photon has passed through which hole, say quantum theorists.

The situation may be that we have only scratched the surface of the full diversity of particles and forces in nature — only focusing on quarks, photons and the like because they are so familiar and accessible to us.

Georgi compares unparticles to a system of photons, which remain massless no matter how energized they become because they never had any mass to start with.

Ordinarily the atom acts as a barrier to photons from the probe beam because it would first absorb them — going from its «ground» state to an «excited» state — and then shoot them back, that is, reflect them.

So the theory tells us why we exist and all this because as I said in my story, this is a philosophical question then again but maybe tells us why we don't float away like a photon.

That's because the system is swaddled in a thick cloud of charged particles shed from the companion star, and these particles scatter photons.

Prof Atatüre says «We chose WS2 because it has higher bandgap, and we wanted to see if different materials offered different parts of the spectra for single photon emission.

Intravital two - photon bone imaging is superior compared with conventional analyses of the shape and form of a tissue because it enables two - dimensional scanning in bone in a focal plane to observe cell shapes and the appearance of mOBs and mOCs in the body.

But he thought that Kibble would be named as a third laureate because he went on to explain in another solo paper in 1967 how to keep photons massless in the new theory, work that paved the way for another Nobel Prize for the electroweak force in 1979.