| Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Art. 1. Objects of Geometrical and Physical Optics 2 - 5. Definitions of a self luminous body, a medium, a ray, a pencil, the axis of a pencil 7 - 10. Laws of Reflection and Refraction. Nature of their proof 11. Finite velocity of light 12, 13. Illumination of surfaces 15 - 17. Definitions of Geometrical focus, principal focus, focal length. |
