How Small Is It - 03 - The Atom (1080p)
Δημοσιεύτηκε στις 1 Δεκ 2014
Text at http://howfarawayisit.com/documents/
In this segment of our “How small is it” video book, we cover the atom.
We
start with J.J. Thompson’s Plum Pudding model of the atom. We then
introduce radiation, and show how Ernst Rutherford used it in his
scattering experiments to develop his version of the atom. We then cover
Niels Bohr’s quantized atomic model along with input from Louis de
Broglie who used the wave nature of electrons to show that they take the
form of standing waves enveloping the nucleus instead of point
particles orbiting the nucleus.
We then introduce Schrodinger’s
Equation, the Heisenberg Uncertainty Principle and the Pauli Exclusion
Principle together with electron spin to fill out what we know about
electrons around atoms. We explain electron tunneling as an example of
these concepts and introduce the Scanning Tunneling Microscope based on
these concepts to see atoms by feeling them.
In closing, we
introduce the atomic nucleus and Chadwick’s discovery of the neutron,
review how small the nucleus is and ask how it is that protons can hold
together in the nucleus when there like charges should push them apart.
STEM
In this segment of our “How small is it” video book, we cover the atom.
We
start with J.J. Thompson’s Plum Pudding model of the atom. We then
introduce radiation, and show how Ernst Rutherford used it in his
scattering experiments to develop his version of the atom. We then cover
Niels Bohr’s quantized atomic model along with input from Louis de
Broglie who used the wave nature of electrons to show that they take the
form of standing waves enveloping the nucleus instead of point
particles orbiting the nucleus.
We then introduce Schrodinger’s
Equation, the Heisenberg Uncertainty Principle and the Pauli Exclusion
Principle together with electron spin to fill out what we know about
electrons around atoms. We explain electron tunneling as an example of
these concepts and introduce the Scanning Tunneling Microscope based on
these concepts to see atoms by feeling them.
In closing, we
introduce the atomic nucleus and Chadwick’s discovery of the neutron,
review how small the nucleus is and ask how it is that protons can hold
together in the nucleus when there like charges should push them apart.
STEM
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