TAKE THIS QUIZ TO SEE WHAT YOU KNOW ABOUT 2ND-3RD GRADE VOCAB FROM BOOKS!
Example sentences from the Web for millikan
Howard and his guest drove to Millikan's Draw, for the wound of the latter was still too new to stand so long a horseback ride.A Texas Ranger|William MacLeod Raine
Your scientist Millikan discovered these rays for you, and in your language they are known as Millikan, or Cosmic, rays.Skylark Three|Edward Elmer Smith
The W-ray was the Millikan cosmic ray, imprisoned and adapted for human use.
Was it possible that the psenium emanations would succeed where the Millikan rays, the W-ray had failed?
Millikan's charge carriers were minute oil drops, which were given elementary charges by means of ionizing rays from radium.The New Gresham Encyclopedia|Various
British Dictionary definitions for millikan
Scientific definitions for millikan
Robert Millikan calculated the charge of an electron with his famous oil-drop experiment in 1910, which took advantage of the fact that droplets of oil can carry an electric charge on their surfaces. He took a closed transparent chamber with two parallel horizontal metal plates, one passing through the middle of the chamber and one on the bottom. The upper plate had a small hole in it, and the plates were connected by an electric current, giving them a charge. Millikan sprayed tiny droplets of oil into the chamber's upper half; these floated downward, with some falling through the hole in the upper plate. Their mass could be calculated by measuring how fast they fell. Millikan then ionized the air in the lower half by beaming x-rays at it, which stripped electrons from the air molecules; the electrons attached themselves to the droplets, giving them a negative charge. By changing the voltage between the two plates, which changed the electric differential between them, he could modulate the rate of the droplets' fall. If the voltage equaled the known gravitational force acting on a droplet, the droplet remained stationary. This voltage, together with the droplet's mass, he then used to calculate the droplet's charge. Millikan found through many experiments that the charge was always a whole-number multiple of a particular quantity, which he deduced was the charge of a single electron (1.602 X 10-19 coulombs). For this discovery, he was awarded the Nobel Prize for physics in 1923.