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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... star clusters . The Royal Astronomical Society rewarded her with a gold metal . When it came to separate stars , Herschel started off on the wrong track , by assuming that all stars were of the same absolute magnitude . Any observer can ...
... stars and other distant objects such as nebulae , whatever they were - and then relating the result to magnitude . The starting point is the apparent magnitude to an observer on earth , but without knowing the distance , this is little ...
... stars the mass could be calculated , and , second , for a sufficient number of such stars , the mass could be consistently related to magnitude . The first condition was satisfied , because the mass of certain stars , the eclipsing ...
المحتوى
From the mastery of fire to science in antiquity | 1 |
Copernicus to Newton | 35 |
Science technology and communication | 77 |
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