Atoms like to emit and absorb photons of particular frequencies. Which frequencies are favored depends on the kind of atom. ... An atom consists of a heavy nucleus surrounded by light electrons. A hydrogen atom has one electron. A helium atom has a ... energy of emitted photon = (atom energy before) - (atom energy after)
zebu.uoregon.edu/~soper/Light/atomspectra.html zebu.uoregon.edu/~soper/Light/atomspectra.html
Because an electron bound to an atom can only have certain energies the electron can only absorb photons of certain energies. ... It was later understood that the Balmer lines are created by energy transitions in the Hydrogen atom. Specifically, when a photon drops from an excited state to the second orbital, a Balmer line...
astro.unl.edu/naap/hydrogen/transitions.html astro.unl.edu/naap/hydrogen/transitions.html
The orbital radii of the hydrogen atom, quantised by the number of wavelengths n: ... Thus an electron in an atom can absorb a photon and jump to a higher orbit, or emit a photon and fall to a lower orbit. The change in orbit is given by the energy of the photon.
www.nrao.edu/~smyers/courses/astro12/L8.html
Bohr model - Wikipedia, the free encyclopedia
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In atomic physics, the Bohr model , devised by Niels Bohr, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar i...
en.wikipedia.org/wiki/Bohr_model
Atom - Wikipedia, the free encyclopedia
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The atom is a basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and e...
en.wikipedia.org/wiki/Atom
An electron in a hydrogen atom cannot have -9 eV, -8 eV or any other value in between. ... Exercise 4. What is wavelength of a photon emitted when an electron jumps from the n = 2 to n = 1 energy level of a singly ionized helium atom? Where is this photon in the electromagnetic spectrum?
cas.sdss.org/DR6/en/proj/advanced/spectraltypes/energyl... cas.sdss.org/DR6/en/proj/advanced/spectraltypes/energylevels.asp
for the electron to jump upwards, ... We can depict an atomic transition graphically by drawing a little ball on the diagram to represent the energy of the atom. If the atom drops from a high level to a lower one, it will emit a photon. The energy of ... the hydrogen atom will absorb the photon and hop up to the n=2 level.
spiff.rit.edu/classes/phys301/lectures/spec_lines/spec_... spiff.rit.edu/classes/phys301/lectures/spec_lines/spec_lines.html
Exploring the line spectrum of hydrogen atom. How a single orbital electron of a hydrogen atom can emit a number of different frequency waves? What is the real mechanism behind the emission of spectrum lines when an atom is excited? ... The atom of hydrogen has only one electron and so one 'electron shell'. When this shell...
www.physics-edu.org/line_spectrum_of_hydrogen_atom.htm www.physics-edu.org/line_spectrum_of_hydrogen_atom.htm
In the following experiment, there is a device below the Bohr model that works like a prism or a diffraction grating. It shows the atomic spectrum for a hydrogen atom. Whenever a photon is emitted, it shows up on the spectrum according to its wavelength. ... Huh. Each time the electron jumps down a level it produces a photon,
www.colorado.edu/physics/2000/quantumzone/lines2.html
We model the hydrogen atom as an electron in a classical circular orbit about a proton. ... (It turns out that this is approximately also the correct quantum mechanical time scale for an excited atom to emit a photon.) Use this time scale to estimate the linewidth (frequency width of the emitted radiation) for an atom at rest.
ocw.mit.edu/NR/rdonlyres/Physics/8-04Spring-2006/AB7FCA... ocw.mit.edu/NR/rdonlyres/Physics/8-04Spring-2006/AB7FCA51-865B-4682-83F2-65DE77E958D5/0/ps1.pdf