| WAVE
NATURE OF LIGHT |
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Properties of waves as they relate to light |
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Wave
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Wavelength
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Frequency
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Speed
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Light
as waves |
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Light
is one form of electromagnetic radiation |
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Electromagnetic
radiation |
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Examples
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Finding
wavelength |
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Finding
frequency |
| FROM
CLASSICAL PHYSICS TO QUANTUM THEORY |
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Planck’s theory |
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The
reason for its development |
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Planck
proposals |
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Planck’s
quantum theory |
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The photoelectric effect |
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The
photoelectric effect could not be explained by classical physics |
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Einstein’s
use of Planck’s theory to explain the photoelectric effect |
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The emission spectrum of hydrogen |
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The
prediction of classical physics and Rutherford’s model of the atom |
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The
new model of the atom would use quantum theory |
| BOHR’S
THEORY OF THE HYDROGEN ATOM |
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Bohr’s Postulates |
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The electron moves in a circular orbit around the
proton |
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Transitions
of the electron occurs between specific energy states and involves
the emission or absorption of a photon of a specific energy and
frequency |
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Bohr’s explanation of the emission spectrum of
hydrogen |
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Bohr’s model completely explained the observed
emission spectra of hydrogen |
| THE
DUAL NATURE OF THE ELECTRON |
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The
history of deBroglie’s proposal |
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deBroglie’s
two proposals |
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Heisenberg’s Uncertainty Principle |
| QUANTUM
MECHANICS |
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Formulated
by Ernst Schroedinger for the hydrogen atom |
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The Schroedinger equation incorporates both particle
behavior and wave behavior |
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Solving the Schroedinger equation for a hydrogen
atom |
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Requires
advanced calculus even for so simple a system |
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Produces
a wave function y |
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Wave
functions |
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Electron
density |
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Orbitals
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The many-electron atom |
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QUANTUM NUMBERS |
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The
principal quantum number |
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The
angular momentum quantum number |
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The magnetic quantum number |
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The spin quantum number |