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  2. René Descartes - Wikipedia

    en.wikipedia.org/wiki/René_Descartes

    Descartes also made contributions to the field of optics. He showed by using geometric construction and the law of refraction (also known as Descartes's law in France, or more commonly Snell's law elsewhere) that the angular radius of a rainbow is 42 degrees (i.e., the angle subtended at the eye by the edge of the rainbow and the ray passing ...

  3. Discourse on the Method - Wikipedia

    en.wikipedia.org/wiki/Discourse_on_the_Method

    Descartes uses the analogy of rebuilding a house from secure foundations, and extends the analogy to the idea of needing a temporary abode while his own house is being rebuilt. Descartes adopts the following "three or four" maxims in order to remain effective in the "real world" while experimenting with his method of radical doubt.

  4. Causal adequacy principle - Wikipedia

    en.wikipedia.org/wiki/Causal_adequacy_principle

    A stone, for example, which previously did not exist, cannot begin to exist unless it is produced by something which contains, either formally or eminently everything to be found in the stone. Descartes goes on to claim that the CAP not only applies to stones, but also the realm of ideas, and the features that are seen as part of the objective ...

  5. Dioptrique - Wikipedia

    en.wikipedia.org/wiki/Dioptrique

    Page of Descartes' "La dioptrique" with the tennis ball example. Descartes uses a tennis ball to create a proof for the laws of reflection and refraction in his third model. This was important because he was using real-world objects (in this case, a tennis ball) to construct mathematical theory.

  6. Cartesianism - Wikipedia

    en.wikipedia.org/wiki/Cartesianism

    In the Netherlands, where Descartes had lived for a long time, Cartesianism was a doctrine popular mainly among university professors and lecturers.In Germany the influence of this doctrine was not relevant and followers of Cartesianism in the German-speaking border regions between these countries (e.g., the iatromathematician Yvo Gaukes from East Frisia) frequently chose to publish their ...

  7. French philosophy - Wikipedia

    en.wikipedia.org/wiki/French_philosophy

    French philosophy, here taken to mean philosophy in the French language, has been extremely diverse and has influenced Western philosophy as a whole for centuries, from the medieval scholasticism of Peter Abelard, through the founding of modern philosophy by René Descartes, to 20th century philosophy of science, existentialism, phenomenology, structuralism, and postmodernism.

  8. Age of Enlightenment - Wikipedia

    en.wikipedia.org/wiki/Age_of_Enlightenment

    Bacon's empiricism and Descartes' rationalist philosophy laid the foundation for enlightenment thinking. [21] Descartes' attempt to construct the sciences on a secure metaphysical foundation was not as successful as his method of doubt applied to philosophy, which led to a dualistic doctrine of mind and matter.

  9. Passions of the Soul - Wikipedia

    en.wikipedia.org/wiki/Passions_of_the_Soul

    In the first part of his work, Descartes ponders the relationship between the thinking substance and the body. For Descartes, the only link between these two substances is the pineal gland (art. 31), the place where the soul is attached to the body. The passions that Descartes studies are in reality the actions of the body on the soul (art. 25).