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Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 50

Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German. Mean line confidence on this page: 0.92.

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The machine reads it as

  1. PROP. +o
  2. Those superficies oftransparent Bodies reflect the rreatest
  3. quantity of Lisht, rehich have the oreatest refractino porver;
  4. that is, rehich intercede mediums that differ most in their
  5. refractive densities. And in the confines of equally re-
  6. fractine mediums thereis no reflexion.
  7. The Analosy betreen reflexion and retraction will
  8. appear by considerins, that irhien Listit passeth ob-
  9. liquelr out ot one medium into another irhich retracts
  10. from the perpendicular, the greater is ditference ot
  11. their retractire density, the lels obliquity is requisite
  12. to cause a total retlexion. For a5 the Sines arc irtrich
  13. measure the retraction, (0 is the sine ot incidence at
  14. ertrich the total reflexion begins, to the radius of the
  15. Cirele, and consequentlr that incidence is least irhere
  16. there isthe oreatest ditterence et the Sines. Phus in the
  17. palsins oF Light out oF Water into AIr, Where the
  18. refraction is mealured by the Ratio oF the Sines 3 t0 4,
  19. the total retlerion begins wrhen the Angle ot incidence
  20. is about 48 degrees 35 minutes. In passins out oFCila(s
  21. into Air, irhere che retraction is meatured by the Ratio
  22. OF the Sines 20 t0 3r, the total rellexion begins erten
  23. the Anele oF incidence is 40 deg. 10 min. and (0 in
  24. passins out oF crystal, or more sronely refractinq me
  25. diums into Air, there is Aill a less obliquity requisite
  26. to cause a total reslexion. Superticies theretore irhich
  27. retract most do (oonest refleet aII the Lioht which is in
  28. cident on them, and (o must be allored most Atrongly
  29. xet exIre.
  30. BUC

Cite

Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 50. Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/1677894601:0226?run=74