L’invariant de Bouguer et ses conséquences : commentaire historique
In the second part of his prize-winning essay of 1729, Bouguer (1698–1758) considers a light ray in a spherically symmetric medium and introduces the invariant named after him. He deduces an expression of the refraction integral, leading to a table which is computed for a particular atmospheric mode...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2023-03-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.115/ |
| Summary: | In the second part of his prize-winning essay of 1729, Bouguer (1698–1758) considers a light ray in a spherically symmetric medium and introduces the invariant named after him. He deduces an expression of the refraction integral, leading to a table which is computed for a particular atmospheric model. He then studies the influence of the ray’s curvature on the horizon dip and predicts the hillingar effect. As a complement, we recall that the Bradley formula can be derived from the Bouguer model. This helps to understand the strong convexity of horizontal refraction versus refractivity. |
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| ISSN: | 1878-1535 |