| Webster's Online Dictionary |
| Expressions | Definition | ||
| Incident ray | The incident ray is the ray of light that strikes the surface before reflection, transmission, or absorption. The angle of this ray is measured from a normal to the surface. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Incident ray | Aerospace | A ray impinging on a surface. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
