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Commit 5d33eb2c authored by Claude Meny's avatar Claude Meny
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    01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/02.plane-refracting-surface-overview/cheatsheet.en.md
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    ...@@ -75,7 +75,7 @@ from an object point generally do not converge towards an image point. ...@@ -75,7 +75,7 @@ from an object point generally do not converge towards an image point.
    Fig. 5a. : If we limit the opening of the spherical refracting surface so that only the rays Fig. 5a. : If we limit the opening of the spherical refracting surface so that only the rays
    meeting the surface near the vertex are refracted through the surface. meeting the surface near the vertex are refracted through the surface.
    ![](dioptre-spherique-non-stigmatique-3)<br> ![](dioptre-spherique-gauss-conditions)<br>
    Fig. 5b. : and if the object points remain close to the optical axis, so that the angles of Fig. 5b. : and if the object points remain close to the optical axis, so that the angles of
    incidence and refraction remain small, then for each object point an image point can be almost incidence and refraction remain small, then for each object point an image point can be almost
    defined, and therefore the spherical refracting surface becomes quasi-stigmatic. defined, and therefore the spherical refracting surface becomes quasi-stigmatic.
    ......
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