Phénomènes d'interférence des rayons de Röntgen

Friedrich, Wolfgang; Knipping, P.; Laue, Μ. v.

doi:10.1051/radium:0191300100204700

Cited by 6 publications

(2 citation statements)

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“…Reportedly, Knipping complained about his discomfort. Finally to record something he (Knipping) placed the plate behind the crystal [13][14][15]. The website at the University of Leeds describes [16], 'the first diffraction photographs (albeit poor and smudgy) of a copper sulfate pentahydrite crystal were first made on 12 (21?)…”

Section: In the Haze Of 'Edisonian Trial And Error'mentioning

confidence: 99%

Laue: right or wrong?

Datta¹

2015

Phys. Scr.

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In 1912, Laue spots were discovered in x-ray scattering 'photograms' of crystals, which were amongst the most consequential experimental findings of the 20th century. Inter alia, spots established the x-ray waves and crystal lattice; plus, for the first time ever, revealed atoms as real physical objects. Laue, a protégé of Planck and a wave-optics expert, had theoretically predicted these spots, and promptly won the Physics Nobel Prize for 1914. The prize did not come easy: executing his experimentum cruces, over the judgments of Sommerfeld and Wien, required force of will and a certain amount of diplomacy. Besides, his explanation for missing spots and x-ray diffraction were proven wrong by Moseley, Darwin and the two Braggs. Traditionally, Laue's three-dimensional diffraction model is reconciled with Bragg's reflection formula by Ewald's construction using reciprocal lattice space. Laue had overlooked that his fundamental equations violate Euclidean length invariance. This article shows that implementation of invariance consolidates Laue's system of three (multi-parameter) equations into a single formula containing one integer, one angle and two distances; plus validating Bragg's conjecture of reflection. This new derivation demonstrates that the mechanism of Laue spots is akin to the anti reflection coating the colour-plays in soap bubbles and oil slicks-reflection and interference not diffraction. Yet, Laue stimulated countless breakthroughs: Nobel Prizes and scientific innovations, with an enduring legacy of inspiration a century later.

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Section: In the Haze Of 'Edisonian Trial And Error'mentioning

confidence: 99%

Laue: right or wrong?

Datta¹

2015

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…The genesis of both can be traced to at least the early twentieth century when an experimental demonstration of the existence of atoms in crystals (and of the wave nature of x-rays) was achieved in 1912 by von Laue [1,2]. The theory of the wave nature of matter had been put forward by de Broglie in 1923 [3] and a theory of the focusing action of an electromagnetic coil was formulated by Busch [4] Fig.…”

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confidence: 99%