By Colin Cooke
Knowing, designing and engaging in experiments is on the center of technological know-how. this article introduces the elemental rules on which physicists should still construct a radical experimental method of their discipline.
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Additional info for An introduction to experimental physics
In the days when equipment was mainly mechanical it would often last a long time provided materials of good quality were used and the construction was sound. Maintenance was often simply a case of applying oil and grease at appropriate places and at regular intervals. Working steam engines pay tribute to the longevity achievable. For many years electronic circuits had to use vacuum valves, which used thermionic emission from a hot cathode as a source of electrons. In bulk these generated large quantities of heat, which made them welcome companions in cold, winter laboratories, but which could lead to unreliability and breakdown as components became too hot for comfort.
It is worthwhile preparing enough columns in your table to contain both the basic and transformed data, as there is nothing worse than having to keep turning pages to compare the two. To avoid doing this, or preparing another table, it is good practice to leave a couple of columns empty, in case you feel the need to carry out some other transformation not thought of at the time. Corrections should be made by crossing out the wrong value and writing in the correct one, not by overwriting, as this can become unclear.
A copy is kept at the NPL, where masses may be compared to a precision of about a microgram on a precision balance. CHARACTERISTICS OF EQUIPMENT 53 (d) The ampere is the constant current that, if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed 1 m apart in vacuum, would produce between these conductors a force equal to 2×10−7 N m−1. 08 µA using a current balance. 01 µV. 16 of the thermodynamic temperature of the triple point of water.
An introduction to experimental physics by Colin Cooke