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Electromagnetic radiation, an inexhaustable natural resource, plays an extremely important part in modern technology and living. We use very short wavelength radiation, that is, x‐rays, in searching for otherwise hidden defects. We use longer wavelength radiation, that is, light, to see by. We...
Physics Today is the journal for all physicists.
Helmholtz discovered that vertical threads which to an observer appear to lie in a frontal parallel plane lie actually in a curved surface.
Previous detailed analyses of conductivity in gases, developed by Enskog, Chapman, and others usually involve the tacit assumption that each collision between two molecules involves a large change in their velocities, either in magnitude or direction.
The annual survey of physicists in training made by Marsh W. White, executive secretary of Sigma Pi Sigma, shows a continued increase in the numbers of students at all levels.
Two years ago Major General Lewis B. Hershey, director of the Selective Service System, appointed six scientific advisory committees (representing the agricultural and biological sciences, the engineering sciences, the healing arts, the humanities, the physical sciences, and the social sciences)...
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