Astronomie

The probability that the most accurate method of determining the solar parallax now available is that resting on the measurement of the velocity of light, has led to the acceptance of the following p …

There is a wide range of radio equipment installed on light aircraft that can be used by pilots when flying under Instrument Flight Rules (IFR). This reference guide provides information on the most …

This exciting essay focuses on the explanation and analysis of Albert Einstein’s The Special and General Theory of Relativity, one the most influential works in history and whose understanding, due t …

IN connexion with the discussion of the physical interpretation of the quantum theoretical methods developed during recent years, I should like to make the following general remarks regarding the pri …

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In the Introduction to this article we called attention to the two distinct modes of attacking any physical problem. Now the conception "state of a body" varies with the chosen mode of atta …

Niels Bohr’s atomic theory of 1913 is one of the absolute highlights in the history of modern science. It was only with this work that physicists realized that quantum theory is an essential ingredie …

Dr. Freundlich has undertaken in the following essay to illumine the ideas and observations which gave rise to the general theory of relativity so as to make them available to a wider circle of reade …

Have you read Baruch?” La Fontaine used to cry, enthusiastically. To-day he would have troubled his friends with the question “Have you read Einstein?” But, whereas one needs only a little Latin to g …

This book is dedicated to Einstein's special relativity. The main topics are: postulates of relativity, events and Minkowski space-time, Lorentz transformations, metrics in scalar products (with …