By Darryl J. Leiter
One other vital survey within the amazing Scientists sequence, A to Z of Physicists focuses not just at the lives and personalities of these profiled, but additionally on their learn and contributions to the sector. a desirable and significant component of this quantity is the eye paid to the stumbling blocks that girls and minority physicists have triumph over to arrive their own targets. via incidents, quotations, and pictures, the entries painting anything of the human face that's frequently misplaced in books on technology and scientists. A to Z of Physicists good points a hundred and fifty entries and 50 black-and-white photos. Culturally inclusive and spanning the complete variety of physicists from precedent days to the current day, this is often an amazing source for college kids and common readers drawn to the historical past of physics or the numerous elements of the non-public lives of vital physicists.
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Extra info for A to Z of Physicists. Notable Scientists [biographies]
In 1734, he returned to Basel to lecture, first on botany and later on physiology—the only post he could get at the time. He would continue to correspond with Euler, who put many of Bernoulli’s physical insights into rigorous mathematical form. When Bernoulli and his father were declared joint winners of the Paris Academy’s Grand Prize that year, the father, enraged that his son had been judged his equal, broke off relations with him. Bernoulli stayed in Basel, barred from his father’s house. A year after publication of Hydrodynamica, his father published Hydraulica, based on his son’s work but written as if his son’s work had been based on his.
Thus, the Bernoulli effect, which governs fluid flow and has many applications, is a consequence of conservation of energy. Applied to aerodynamics, it explains how a moving wing whose cross section has the shape of an airfoil (curved on the top, flat on the bottom) experiences the lifting force that allows an airplane to fly. The curve of the wing is designed to create a faster flow of air over the top of the wing than over the bottom. As a result of the Bernoulli effect, the air pressure over the top of the wing is lower than the air pressure beneath the wing.
In 1935, he became the first physicist to use the QED formalism to determine the cross section (the probability) of elec- trons scattering on positrons—a phenomenon that is now known as Bhabha scattering. After this important work, Bhabha focused on the study of cosmic rays and, in a classic paper written with W. Heitler in 1937, suggested that the highly penetrating particles detected at ground level could not be electrons (nine years later these highly penetrating particles were in fact found to be mu mesons).