| English | eng-000 |
| reference angle | |
| 普通话 | cmn-000 | 入射角 |
| 普通话 | cmn-000 | 参考角 |
| 普通话 | cmn-000 | 基准角 |
| English | eng-000 | angle of arrival |
| English | eng-000 | angle of fall |
| English | eng-000 | angle of incidence |
| English | eng-000 | entrance angle |
| English | eng-000 | incidence |
| English | eng-000 | incident angle |
| English | eng-000 | striking angle |
| English | eng-000 | witness angle |
| русский | rus-000 | угол падения |
| русский | rus-000 | угол приведения |