A Planetary design of the Atom
|The Bohr atom|
But the Orbits room Quantized
|Quantized power levels in hydrogen|
Atomic Excitation and also De-excitationAtoms can make transitions between the orbits allowed by quantum mechanics byabsorbing or emitting specifically the power difference between the orbits. Thefollowing figure shows an atom excitation reason by absorption of a photon andan atom de-excitation led to by emission of a photon.
|Excitation by absorption of light and de-excitation by emissions of light|
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This energy may be calculated bydividing the product the the Planck continuous and the rate of lighthc by the wavelength of the light). Thus, an atom deserve to absorbor emit only certain discrete wavelengths (or equivalently, frequencies orenergies).