Translations:Sketcher ConstrainSnellsLaw/4/en

From FreeCAD Documentation
Revision as of 15:26, 23 April 2024 by FuzzyBot (talk | contribs) (Importing a new version from external source)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
  1. Prepare two lines to represent a beam of light, and an edge to act as an interface. The lines should be on different sides of the interface. The interface can be a line, an arc, a circle or a conic.
  2. Select an endpoint of the first line, an endpoint of the second line, and the interface edge. Note the selection order of the endpoints.
  3. There are several ways to invoke the tool:
    • Select the Sketch → Sketcher constraints → Constrain refraction (Snell's law) option from the menu.
    • Use the keyboard shortcut: K then W.
  4. The Refractive index ratio dialog opens.
  5. Enter the Ratio n2/n1. Where n2 is for the medium where the second selected line resides, and n1 is for the first line's medium.
  6. A Snell's law constraint is added. If required the endpoints are made coincident and constrained onto the interface. These additional constraints are called helper constraints.