Introduction to modern physics - FSU Physics Department
Introduction to modern physics - FSU Physics Department
Introduction to modern physics - FSU Physics Department
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Thermal energy, heat, temperature<br />
observation of ”Brownian motion” ” (1827):<br />
• small seeds (e.g. burlap) suspended in liquid show erratic<br />
motion (“random motion”)<br />
• http://galileo.phys.virginia.edu/classes/109N/more_stuff/Applets/brownian/brownian.html<br />
h i i i / l ss s/109N/m st l ts/b i /b i html<br />
• http://www.aip.org/his<strong>to</strong>ry/einstein/brownian.htm<br />
kinetic theory of heat (Boltzmann, Maxwell,...)<br />
• heat is a form of energy;<br />
• internal energy = thermal energy of material bodies is<br />
related <strong>to</strong> random motions of molecules or a<strong>to</strong>ms<br />
• temperature is a measure of this internal energy .<br />
• explanation of Brownian motion: Albert Einstein (1905):<br />
calculated speed of “diffusion” from kinetic theory of<br />
heat - found in agreement with experimental<br />
measurements<br />
• strong support for a<strong>to</strong>mic picture of matter<br />
• http://en.wikipedia.org/wiki/Theory //en.wikipedia.org/wiki/Theory_of_hea<strong>to</strong>f heat<br />
• http://en.wikipedia.org/wiki/Kinetic_theory<br />
• http://www.vias.org/<strong>physics</strong>/bk2_03_02.html<br />
• http://www.youtube.com/watch?v=-n90pfbiBJE<br />
• http://galileo.phys.virginia.edu/classes/252/kinetic_theory.html<br />
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