Roger Bacon's Theory of the Rainbow: Progress or Regress?

@article{Lindberg1966RogerBT,
  title={Roger Bacon's Theory of the Rainbow: Progress or Regress?},
  author={David C. Lindberg},
  journal={Isis},
  year={1966},
  volume={57},
  pages={235 - 248}
}
HE PRIMARY RAINBOW is explained by Theodoric of Freiberg (d. c. 1311) in the following way: when sunlight falls on individual drops of moisture the rays undergo two refractions (upon ingress and egress) and one reflection (at the back side of the drop) before transmission to the eye of the observer.1 The path of sunlight within the drop, as correctly traced by Theodoric, is illustrated in Figure 1. Yet, before the rainbow 

A short history of the rainbow

The history of the rainbow is as old as that of science. The ancient Greek philosophers tried to describe the rainbow, and Aristotle was the first to fully include it among the phenomena studied by

Bow-shaped caustics from conical prisms: a 13th-century account of rainbow formation from Robert Grosseteste's De iride.

A novel characterization of cone-light interactions is presented, demonstrating that transparent cones do indeed give rise to bow-shaped caustics-a nonintuitive phenomenon that suggests Grosseteste's theory of the rainbow is likely to have been grounded in observation.

Color-coordinate system from a 13th-century account of rainbows.

A modern understanding of the physics of rainbows and of human color perception is combined to resolve the linguistic ambiguities of the medieval text and to interpret Grosseteste's key terms.

Bow-shaped caustics from conical prisms : a 13th-century account of rainbow formation from Robert Grosseteste’s De iride

eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse This article is distributed under the terms of the Creative Commons Attribution (CC BY) licence. This licence allows you to distribute,

This is a repository copy of Bow-shaped caustics from conical prisms : a 13 th-century account of rainbow formation from Robert Grosseteste

eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse This article is distributed under the terms of the Creative Commons Attribution (CC BY) licence. This licence allows you to distribute,

The Theological Use of Science in Robert Grosseteste and Adam Marsh According to Roger Bacon: The Case Study of the Rainbow

In his late writings, Roger Bacon asserts that philosophy and science must be at the service of theology and that his views on scientific problems directly connected with theological issues derive

Ibn al-Haytham, the Arab who brought Greek optics into focus for Latin Europe

In atiquity there was no differentiation between the eye, light and vision. Optics was the study of vision. Debate continued for nineteenhundred years, from Plato to Kepler, as to whether vision

Controlling the appearance of specular microstructures

The focus of this dissertation is the appearance modeling of specular microstructures, and introduces a novel approach for creating an art-directable hair shading model from existing physically based models that is easier to use compared to both physically based and ad hoc shading models.

A Programmatic Attempt at an Anthropology of Knowledge

Traditionally, the main preoccupations of philosophy of science were the justification or refutation of the conclusions of science; critical study of methodology; the pursuit of truth presupposing