Explore gamma rays and where they fit in relationship to other forms of electromagnetic energy, such as radio waves and x-rays.
The Ritz-Carlton in Qatar presidential suite has a private elevator, four guest baths and captivating terrace views in every direction. The Fairmont Kea Lani located on the Southern part of Maui in Wailea has the best sunsets on the entire island. Pow Wow Hawaia€™i is a gathering of contemporary artists that engages with the broader community in the process and creation of art in the streets, For the second annual event. Boundary pushing architectural firm Zecc Architects breathed a decidedly modern life into an old world cathedral in the Netherlands by redesigning it from the ground up, turning an antiquated house of worship into a stunningly beautiful home.
Hanging Out With LionsBrave man hanging out with lions on a Zebra striped car in South Africa. Emission Lines and BandsThe Bohr model for the atom, showing the nucleus and different levels that an electron can occupy.
Learn what events and celestial bodies produce gamma rays, from nuclear explosions to supernovas. Suspended 192 metres high is the 1.2 metre wide ledge that circles the widest part of Aucklanda€™s Sky Tower. Click here for original source URL.As an electron drops to a lower energy level, it loses energy by emitting a photon. The photon's energy equals the difference in energy between its energy level and the one below it.

A familiar astronomical example is the radiation produced by a sample of hydrogen gas containing neutral (or uncharged) atoms with their electrons at different energy levels. An emission line results from the emitted photons and appears in a projected spectrum as a line or narrow bar of color. An atom in which all electrons are in the lowest possible energy level is said to be in its ground state. An atom in which one or more electrons are in energy levels higher than the lowest available ones is said to be in an excited state. Excited states usually last only a fraction of a second before the electrons decay to the lowest available energy level — trying to reach equilibrium. In a hot gas, the same role can be served by collisions of the atoms or molecules themselves.
Heating a gas enclosed within a certain volume increases the velocity of atoms and so increases the probability that they will collide with each other.
Click here for original source URL.Emission line spectrum of hydrogen in the visible part of the spectrum. The energy required to raise an electron from the ground state to be free of the atom is the largest amount of energy that can result in a spectral line. Other electron transitions in hydrogen have smaller energy differences, so they yield redder spectral lines. Heavier elements have more electron energy levels so they have more possible transitions and a denser thicket of emission lines.

But for the most common elements like carbon and nitrogen and oxygen and silicon, the spectral lines fall in the same region of the electromagnetic spectrum. Most of the useful emission lines fall in the decade of wavelength from 100 nm to 1000 nm (or 0.1 micron to 1 micron). This spans the visible spectral range but also extends to ultraviolet and infrared wavelengths.
For example, a gas containing water molecules (H2O) has many more emission lines than a gas containing single H and O atoms. The molecule has various ways of responding to a disturbance in addition to having its electrons change energy levels. As a result, the energy levels from a molecule are vastly more numerous, and the resulting emission lines blend together into a broader emission feature called an emission band. A given molecule (such as H2O) can produce only certain emission bands, allowing us to identify the molecule in a remote source.

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