Poynting, J. H. (John Henry), 1852-1914, Shakespear, Gilbert Arden, ed, Barlow, Guy, joint ed · Cambridge, University Press · leaf 489
esof maxima and minima, and exact calculation shows that these are oppositepoints a little to the left otA,B,C respectively. Fig. 9 shows the effect whenthe screen is some distance from 0; and now there is only a slight irregularityin the fifth triangle, so that the area is only shghtly different… … Kg. 5. Just without the geometrical shadow. Fig. 6. First maximum. Fig. 7. First minimum. Fig. 8. Secondmaximum. Fig. 9. Distant maximum. If the screen is now put with its edge to the left of 0, P is within thegeometrical shadow. There will now be a circular area round 0, and touchingthe edge,…
Poynting, J. H. (John Henry), 1852-1914 · Physics
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![An illustration from Henry Cornelius Agrippa's Fourth book of occult philosophy, and geomancy. Magical elements of Peter de Abano. Astronomical geomancy [by Gerardus Cremonensis]. The nature of spirits [by Gorg Pictorius]. And arbatel of magic (1655)](https://img.insideoutlibrary.com/img/200/ia-cu31924006718757-38-4.webp)
