A Brief History of Science: As Seen Through the Development of Scientific InstrumentsConstable, 2001 - 425 من الصفحات From the beginnings of history, with gnomons and sundials, through to the twenty-first century and the 26-kilometre underground particle accelerator, the author describes the way that the design and production of scientific instruments has extended the frontiers of science. Man's desire to understand the universe has led to the making of more and more sophisticated instruments - first to record and measure (Arab numerals, standardised measures), to examine ever more minutely (the microscope, the lens, the prism), on through electromagnets, cathode tubes, thermometers, vacuum pumps, X-rays, counters and accelerators, semi-conductors and microprocessors, down to new instruments now being designed to observe matter at zero temperatures - presenting immense technological problems in the requirement for instruments that can operate in conditions where normal properties no longer hold. Accessible popular science |
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... uranium turned air into a conductor of electricity , while others had found that a certain ' saturation point ' defined a limit to its conductivity . The Curies decided to measure the energy given off by uranium , and also to test other ...
... uranium . This , however , was subject to a critical limitation : according to a paper published by Bohr in September 1939 , only the odd- numbered isotope of uranium , 235U , could produce a chain reac- tion . The problem was that ...
... uranium would be converted into plutonium by capturing neutrons . Fermi's previous experimental work had already shown that the chance of capture was optimal at a certain ratio between the volume of the graphite and that of the uranium ...
المحتوى
From the mastery of fire to science in antiquity | 1 |
Copernicus to Newton | 35 |
Science technology and communication | 77 |
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