Millikan

Millikan R A A new modification of the cloud method of determining the elementary electrical charge and the most probable value of that charge Phil. Mag. 19 209-28... 

The final technique addressed in this chapter is the measurement of the surface work function, the energy required to remove an electron from a solid. This is one of the oldest surface characterization methods, and certainly the oldest carried out in vacuo since it was first measured by Millikan using the photoelectric effect [4]. The observation of this effect led to the proposal of the Einstein equation ... 

Millikan has shown that the overlap integral for hydrogen-like p orbitals in linear hydrocarbons is about 0.27 (Millikan, 1949). 

R. A. Millikan (California Institute of Technology, Pasadena) work on the elementary charge of electricity and on the photo-electric effect. 

Fig. 14-7. Millikan s oil-drop apparatus for determining the electron charge.

When several oil drops enter the observation chamber of the Millikan apparatus, the voltage is turned on and adjusted. One drop may be made to remain stationary, but some of the others move up while still others continue to fall. Explain these observations. 

Microwave spectroscopy, 249 Millikan, Robert, 241 oil drop experiment, 241 Minerals, 373, 385 Miscible, 176 Model... 

An extensive study by Blackman (3) and a recent study by Millikan and White (21) on the vibrational relaxation of 02 are shown in Figure 2. The impurity of Blackman s sample varied from 1-5%, but the bulk impurity was nitrogen. Blackman s data at lower temperatures are significantly different from Millikan and White s values. The latters data have the same temperature dependence as Equation 5 over the... 

The temperature dependence of Z for CO is very similar to the above two systems (Figure 3). Experimental data of Millikan and White and of Gaydon and Hurle (10) at temperatures above 1000 °K. are again larger than our values by a factor of 5. Windsor, Davidson, and Taylor (34) obtained a larger Z value than the ones above. 

American physicist Robert A. Millikan and his student Harvey Fletcher designed an experiment to determine the charge on the electron. As shown in Figure 2-14. the apparatus was a chamber containing two electrical plates. An atomizer sprayed a mist of oil droplets into the chamber, where the droplets drifted through a hole in the top plate. A telescope allowed the experimenters to measure how fast the droplets moved downward under the force of gravity. The mass of each droplet could then be calculated from its rate of downward motion. 

C02-0041. In Millikan s oil drop experiment, some droplets have negative charges, so others must have... 

C02-0107. In discovering the electron, Thomson was able to measure the ratio of the electron s mass to its charge, but he was unable to determine the mass of a single electron. How did Millikan s experiment allow the mass of the electron to be determined ... 

De Broglie received the Nobel Prize in physics in 1929, only two years after experiments confirmed his theory. Davisson, a student of Nobel laureate Robert Millikan, and Thomson, the son and student of J. J. Thomson (who won the Nobel prize for discovering the electron), shared the Nobel Prize in physics in 1937. 

If any oil droplets in Millikan s oil drop experiment had possessed a deficiency of electrons, the droplets would have been positively charged and would have been attracted to, not repelled by, the negatively charged plate. There would have been no voltage setting possible where the electrical and gravitational forces on the drop would have balanced. 

We see that these values are consistent with the charge that Millikan found for that of the electron, and he could have inferred the correct charge from these data, since they are all multiples of e. 

For example, George Ellery Hale, James R. Angell, and Robert A. Millikan c ted the productivity of such teams as evidence for the power of cooperation in research, and they called for a similarly coordinated approach to scientific problems in peacetime (1, 2). 

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