Sentences with phrase «emitted by atoms»

Not exact matches

«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).

Strogatz explores dozens of strange synchronous phenomena, from hands clapping in unison to the rhythmic flashing of fireflies to laser beams produced by trillions of atoms emitting light waves in phase at the same frequency.

The «H» in HERA stands for hydrogen, and the instrument's antennas are tuned to detected a wavelength of light emitted by hydrogen atoms.

In certain isotopes of particular elements — species of atoms characterized by a given number of protons and neutrons — two beta decays can occur simultaneously, emitting two electrons and two antineutrinos.

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.

Atomic clocks now routinely tick off nanoseconds (one billionths of a second) by tuning microwave lasers to match one frequency of light emitted by a cesium atom.

Instead of searching for the light from individual galaxies with an optical telescope, the team stalked a different quarry, red - shifted radio waves emitted by hydrogen atoms floating in huge clouds within the galaxies.

It did not find a sudden decrease in the brightness of the light emitted by neutral hydrogen atoms at any point in that period, suggesting that re-ionisation did not occur suddenly.

The telescope detects radio waves that have been emitted by neutral hydrogen atoms.

Just as the quartz crystal in a Swiss watch keeps time by vibrating at a steady frequency (about 32,000 cycles per second), the maser coaxes a supply of specially selected hydrogen atoms to emit radio waves at an unwavering 1.42 billion cycles per second.

The motion of an emitted electron is strongly affected by interactions inside the atom from which the electron is emitted.

The spectrometer is sensitive to wavelengths of light emitted by iron atoms that have lost all but 11 or 14 of their electrons.

By heating the crystal and changing the arrangement of its atoms, they could control the amount of light scattering within the laser and hence the color of emitted light.

When a collision happens, a xenon atom will recoil and emit a tiny flash of light, which is detected by LUX's light sensors.

It has long been established that any excited atom will reach its lowest state by emitting photons, and the spectrum of light and microwaves emitted from them represents a kind of atomic fingerprint and it is a unique identifier.

Their color derives from flaws in the gem's carbon structure: some of the carbon atoms have been replaced by an element, such as boron, that emits or absorbs a specific color of light.

The tick of an atomic clock is measured by the frequency of radiation emitted when electrons around an atom change energy states.

Albert Einstein proposed in 1917 that the right wavelength of light can stimulate an excited atom to emit light of the same wavelength, essentially amplifying it, but Townes was stymied by how to corral a gas of excited atoms without them flying apart.

Ordinary atoms can change their energy levels under the right conditions by either absorbing or emitting a photon.

Stroberg studies the structure of the nucleus of atoms (the part made of protons and neutrons) by smashing atoms together at high speeds and measuring the gamma - rays that are emitted.

With the model, Chiloyan and Chen were able to calculate and sum up the electromagnetic fields emitted by individual atoms, based on their positions and forces within each lattice.

That group inferred the spin speed by measuring the distortion of high - energy light emitted by iron atoms in the accretion disk.

These filters isolate blue and near - infrared light, along with red light emitted by hydrogen atoms and green light from Strömgren y.

In addition, because the atoms emit at a very specific wavelength, the scientists could detect the galaxy's rotation by tuning the telescopes» radio receivers to receive radio waves whose length has been changed by Doppler shifting.

The first stars, however, also began emitting intense ultraviolet radiation that «re-ionized» neutral hydrogen atoms formed after the Big Bang by tearing electrons from their proton nuclei.

«We saw number of spectral features emitted by ionized atoms in the galaxies such as hydrogen, oxygen, and neon, which allowed us to determine the metal content of the galaxies.»

The VLA can image the gas in such galaxies because it is particularly sensitive to the radio waves naturally emitted by hydrogen atoms.

Like the main nebula M42, this is an emission nebula, shining by the light emitted from its atoms, after being excited by the high - energy radiation of massive, very hot young stars within it.

Ozone - depleting substances are emitted by human activity at the planet's surface and eventually travel to the stratosphere, where there the chlorine atoms and certain other constituent parts break apart the three oxygen atoms that make up an ozone molecule.

Just like yellow light is not absorbed or emitted by H atoms, IR is not absorbed or emitted by N2 & O2.

Well the interaction time of two atoms or molecules in collision, is very much faster by many orders of magnitude, than the mean time between molecular collisions that result in pressure broadening of molecular absorption lines; and that means that the uncertainties in the emitted photon energies become extremely large.

Ordinary atoms, once ionized by the removal of one or more electrons, also emit a continuum EM spectrum, which is not quantized, because a newly captured free electron can have any initial energy before being captured by the ion.