| Link | Quote | Stars | Tags | Author |
| d543969 | The Angles of Refexion and Refraction, lie in one and the same Plane with the Angle of Incidence. | History of optics | ||
| 8169851 | The Angle of Reflexion is equal to the Angle of Incidence. | History of optics |
| Link | Quote | Stars | Tags | Author |
| d543969 | The Angles of Refexion and Refraction, lie in one and the same Plane with the Angle of Incidence. | History of optics | ||
| 8169851 | The Angle of Reflexion is equal to the Angle of Incidence. | History of optics |