Word: electronics
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...that cosmic rays are photons, or particles of light. He believes they originate from the creation of matter between the stars. But where they originate was not the nub of last week's symposium. What they are was the point. Dr. Compton declared again that they were electrons (and/or photons) coming to earth from beyond the atmosphere, or originating at the top of the atmosphere. When a photon hits an atom in the atmosphere, the atom emits an electron. When an electron hits an atom, the atom emits a photon. Dr. Millikan declares that photons appear first, Dr. Compton...
When a smallest thing is discovered it must be observed more than once to be believed. In February, Cambridge University's Dr. James Chadwick proclaimed the existence of the neutron, new smallest thing (TIME, March 7). With the proton (positive electricity), electron (negative electricity) and photon (light particle), this made four smallest things. But the neutron is elusive, hard to find. It contains no detectable electric charge. It leaves no marks in the form of ionized or electrified particles when it passes through a gas. Having no charge, it is not repelled by charged atoms. Hence...
...been bombarding atoms with alpha particles are Mme Curie's daughter, Irene Curie-Joliot, her husband F. Joliot, Dr. Chadwick and Professor Walter Bothe of Giessen, Germany. Professor Bothe, bombarding beryllium, decided he was creating an artificial super-gamma ray. Dr. Chadwick decided that a proton and an electron knocked loose by alpha particles might combine, without any electrical charge at all, in one unit to make a neutron. This self-contained unit might be the ultimate unit of magnetism, having within itself opposite poles...
That is the neutron. It lacks electrical characteristics. The charges of proton and electron have bound and balanced each other. A particle has been formed halfway between nascent electricity and atomic hydrogen. It hops out of radioactive substances as do alpha particles...
...physics, Dr. Theodore Lyman, they gave the Frederick Ives Medal, and where they heard learned discourse. Dr. Albert Wallace Hull of General Electric described two meticulous counters:1) the device of Dr. Merle Anthony Tuve of the Carnegie Institution (TIME, Feb. 8), which measures a current of one electron per second, smallest current measured so far; 2) the device (including thyratron tubes) of Dr. Wynn Williams of Cambridge University, England, which counts alpha particles (nuclei of helium atoms) as they explode from radium at a speed of 12,000 mi. per sec., and ten microseconds apart. (A microsecond...