Read e-book online A century of Nature: twenty-one discoveries that changed PDF

By Laura Garwin, Tim Lincoln, Steven Weinberg

ISBN-10: 0226284158

ISBN-13: 9780226284156

Some of the medical breakthroughs of the 20 th century have been first pronounced within the magazine Nature. A Century of Nature brings jointly in a single quantity Nature's maximum hits—reproductions of seminal contributions that modified technology and the realm, followed by means of essays written by way of best scientists (including 4 Nobel laureates) that supply ancient context for every article, clarify its insights in swish, obtainable prose, and rejoice the serendipity of discovery and the rewards of attempting to find needles in haystacks.

Show description

Read or Download A century of Nature: twenty-one discoveries that changed science and the world PDF

Similar history & philosophy books

John Waller's Fabulous science PDF

The good biologist Louis Pasteur suppressed 'awkward' info since it did not aid the case he was once making. John Snow, the 'first epidemiologist' was once doing not anything others had no longer performed earlier than. Gregor Mendel, the intended 'founder of genetics' by no means grasped the elemental ideas of 'Mendelian' genetics.

Get Induction, Probability, and Confirmation PDF

Hardcover with gray textile forums, tight backbone and fresh pages. No airborne dirt and dust jacket.

Read e-book online Remarks on the Foundation of Mathematics PDF

2014 Reprint of 1956 variation. complete facsimile of the unique variation, no longer reproduced with Optical acceptance software program. released in English and German with each one textual content provided on opposing pages. "Remarks at the Foundations of arithmetic" are Wittgenstein's notes at the philosophy of arithmetic.

Read e-book online Philosophy and Geometry: Theoretical and Historical Issues PDF

Philosophers have studied geometry on account that precedent days. Geometrical wisdom has frequently performed the position of a laboratory for the philosopher's conceptual experiments devoted to the ideation of strong theories of data. Lorenzo Magnani's new e-book Philosophyand Geometry illustrates the wealthy intrigue of this attention-grabbing tale of human wisdom, delivering a brand new research of the information of many students (including Plato, Proclus, Kant, and Poincaré), and discussing conventionalist and neopositivist views and the matter of the origins of geometry.

Extra resources for A century of Nature: twenty-one discoveries that changed science and the world

Sample text

As viewed along the incident beam the arrangement of atoms in the crystal exhibits a threefold symmetry. Three {100}-normals equally spaced in azimuth emerge from the crystal in latitude 35°, and, midway in azimuth between these, three {111}-normals emerge in latitude 20°. It will be convenient to refer to the azimuth of any one of the {100}-normals as a {100}-azimuth, and to that of any one of the {111}-normals as a {111}azimuth. A third set of azimuths must also be specified; this bisects the dihedral angle between adjacent {100}- and {111}-azimuths and includes a {110}-normal lying in the plane of the target.

In his 1924 doctoral thesis for the Sorbonne, he proposed that electrons of velocity v should be associated with a wave of wavelength λ ϭ h/ mv (where m is the electron mass). Bohr’s quantum condition could then be understood as a requirement that the electron wave form a standing wave along the electron’s path around the nucleus. In other words, the electron wavelength should fit a whole number of times into the circumference of the orbit. De Broglie’s hypothesis implied that electrons outside atoms should also exhibit wavelike properties, such as interference and diffraction.

But his quantum condition remained mysterious, having no supporting physical picture. Such a picture was provided by Louis de Broglie, who suggested that if light could behave as particles, then why shouldn’t electrons behave as waves? In his 1924 doctoral thesis for the Sorbonne, he proposed that electrons of velocity v should be associated with a wave of wavelength λ ϭ h/ mv (where m is the electron mass). Bohr’s quantum condition could then be understood as a requirement that the electron wave form a standing wave along the electron’s path around the nucleus.

Download PDF sample

A century of Nature: twenty-one discoveries that changed science and the world by Laura Garwin, Tim Lincoln, Steven Weinberg


by Donald
4.3

Rated 4.89 of 5 – based on 14 votes