New PDF release: A century of Nature: twenty-one discoveries that changed

By Laura Garwin, Tim Lincoln, Steven Weinberg

ISBN-10: 0226284158

ISBN-13: 9780226284156

The various medical breakthroughs of the 20 th century have been first stated within the magazine Nature. A Century of Nature brings jointly in a single quantity Nature's maximum hits—reproductions of seminal contributions that modified technological know-how and the realm, observed by way of essays written by means of best scientists (including 4 Nobel laureates) that offer ancient context for every article, clarify its insights in sleek, obtainable prose, and have a good time the serendipity of discovery and the rewards of looking for needles in haystacks.

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

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The intensity of the reflected wave is greater in the directions in which the crests of the ripples overlap to interfere constructively and is less in the directions in which the crest of one ripple and the trough of another overlap to interfere destructively. This constructive and destructive interference produces the diffraction peaks, which occur at angles related to the wavelength of the impinging wave (λ) and the spacing of the atoms in the crystal. 28 akira tonomura later attributed3,4 to the effect of the acceleration of electrons by the electric field at the nickel surface: when the electrons entered the crystal, their velocity increased, and so their de Broglie wavelength decreased.

Particles and waves reflecting from a crystal. a, When particles are reflected from a regular array of atoms on a solid surface, the angular distribution of the reflected particles is given by the sum of the particles scattered by each atom. b, But when waves, such as X-rays, impinge on the surface, each atom produces ripples of reflected radiation. The intensity of the reflected wave is greater in the directions in which the crests of the ripples overlap to interfere constructively and is less in the directions in which the crest of one ripple and the trough of another overlap to interfere destructively.

The two thousand miles of territory which separate this creature from its nearest living anthropoid cousins is indirect testimony to its increased intelligence and mastery of its environment. It is manifest that we are in the presence here of a pre-human stock, neither chimpanzee nor gorilla, which possesses a series of differential characters not encountered hitherto in any anthropoid stock. This complex of characters exhibited is such that it cannot be interpreted as belonging to a form ancestral to any living anthropoid.

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


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