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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... neutron . On the other hand only Chadwick was single - minded in his search for it . In a letter to a colleague in 1968 , he wrote , " The reason that I found the neutron was that I had looked , on and off , since about 1923 or 4 . I ...
... neutron . In 1934 the Joliot - Curies produced artificial radioactivity by bombarding aluminium with a - particles . The result , following the equation 27 Al + * He 30p + n , - was a new unstable isotope of phosphorus plus a neutron ...
... neutrons , Fermi investigated the capacity of lead to absorb them . Fermi first had a lead screen placed between the neutron source and the silver , but then chanced to replace this with one made of paraffin wax . This greatly increased ...
المحتوى
From the mastery of fire to science in antiquity | 1 |
Copernicus to Newton | 35 |
Science technology and communication | 77 |
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