Katodong sinag

Isang sinag ng ng mga katodo na bumaluktot sa isang bilog ng isang *magnetic field* na nalikha sa pamamagitan ng isang rolyong Helmholtz. Kadalasang hindi nakikita ang mga katodong sinag; sa tubong ito, ang tamang natirang gas ay iniwang upang ang atomo ng gas ay magliwanag mula sa *fluorescence* kapag tumama ito sa pamamagitan ng mabilisang paggalaw ng mga elektron.

Ang katodong sinag (sa Ingles: cathode ray), na tinatawag ding sinag ng elektron (Ingles: electron beam o e-beam), ay tumutukoy sa mga daloy (mga stream) ng mga elektron na mapagmamasdan sa mga tubong bakyum (mga vacuum tube).

Una silang naobserbahan noong 1859 ng pisikong Aleman na si Julius Plücker at Johann Wilhelm Hittorf,^[1] at pinangalanan noong 1876 ni Eugen Goldstein bilang Kathodenstrahlen, o mga katotong sinag.^[2]^[3] Noong 1897, ipinakita ng pisikong Britanyo na si J. J. Thomson na ang mga cathode ray ay binubuo ng dati nang hindi kilalang partikulo na may negatibong charge, na kalaunan ay pinangalanang elektron. Gumagamit ang mga cathode-ray tube (CRTs) ng nakatutok na sinag ng mga elektron na pinalihis ng mga electric o magnetic field upang mag-render ng larawan sa isang screen.

Mga sanggunian

↑ Martin, Andre (1986), "Cathode Ray Tubes for Industrial and Military Applications", sa Hawkes, Peter (pat.), Advances in Electronics and Electron Physics, Volume 67, Academic Press, p. 183, ISBN 9780080577333, Evidence for the existence of "cathode-rays" was first found by Plücker and Hittorf ...{{citation}}: CS1 maint: date auto-translated (link)
↑ E. Goldstein (May 4, 1886) "Vorläufige Mittheilungen über elektrische Entladungen in verdünnten Gasen" (Preliminary communications on electric discharges in rarefied gases), Monatsberichte der Königlich Preussischen Akademie der Wissenschaften zu Berlin (Monthly Reports of the Royal Prussian Academy of Science in Berlin), 279-295. From page 286: "13. Das durch die Kathodenstrahlen in der Wand hervorgerufene Phosphorescenzlicht ist höchst selten von gleichförmiger Intensität auf der von ihm bedeckten Fläche, und zeigt oft sehr barocke Muster." (13. The phosphorescent light that's produced in the wall by the cathode rays is very rarely of uniform intensity on the surface that it covers, and [it] often shows very baroque patterns.)
↑ Joseph F. Keithley The story of electrical and magnetic measurements: from 500 B.C. to the 1940s John Wiley and Sons, 1999 ISBN 0-7803-1193-0, page 205

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[1] Martin, Andre (1986), "Cathode Ray Tubes for Industrial and Military Applications", sa Hawkes, Peter (pat.), Advances in Electronics and Electron Physics, Volume 67, Academic Press, p. 183, ISBN 9780080577333, Evidence for the existence of "cathode-rays" was first found by Plücker and Hittorf ...{{citation}}: CS1 maint: date auto-translated (link)

[2] E. Goldstein (May 4, 1886) "Vorläufige Mittheilungen über elektrische Entladungen in verdünnten Gasen" (Preliminary communications on electric discharges in rarefied gases), Monatsberichte der Königlich Preussischen Akademie der Wissenschaften zu Berlin (Monthly Reports of the Royal Prussian Academy of Science in Berlin), 279-295. From page 286: "13. Das durch die Kathodenstrahlen in der Wand hervorgerufene Phosphorescenzlicht ist höchst selten von gleichförmiger Intensität auf der von ihm bedeckten Fläche, und zeigt oft sehr barocke Muster." (13. The phosphorescent light that's produced in the wall by the cathode rays is very rarely of uniform intensity on the surface that it covers, and [it] often shows very baroque patterns.)

[3] Joseph F. Keithley The story of electrical and magnetic measurements: from 500 B.C. to the 1940s John Wiley and Sons, 1999 ISBN 0-7803-1193-0, page 205

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