Download - Early Quantum Theory and Models of the Atom
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Early Quantum Theory and Models of the Atom
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Discovery of Electron
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Cathode Rays
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e/m measurement
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/1076.1
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Oil-Drop Experiment to find e
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Blackbody Radiation
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All objects emit radiation whose total intensity is proportional to the fourth power of the Kelvin temperature.
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A blackbody is a body that would absorb all the radiation falling on it.
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Wien’s Law
KmTp 3109.2
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The Sun’s Surface Temperature
Estimate the temperature of the surface of our Sun, given that the Sun emits light whose peak is in the visible spectrum at around 500 nm.
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Star Color
Suppose a star has a surface temperature of 32,500 K. What color would this star appear?
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Energy distributed among the oscillating electric charges of the molecules is not continuous, but instead consists of a finite number of very small discrete amount, each related to the frequency of oscillation as:
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Planck’s Quantum Hypothesis
Planck’s assumption suggests that the energy of any molecular vibration could be only some whole number multiple of hf:
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