. First lessons in reality, or, The psychical basis of physical health. ght of the True War-rior. A Warrior capable of bearing and hurling alance. I, therefore, turn to the Staff with which Istarted. This conclusion is, after all, only anotherbeginning. The Ray of Light is now my Lance,armed with which I continue my spiral and unend-ing course in Reality. APPENDIX. OUTLINE LESSON IN OPTICS. I. Refraction. Rays of light in passing* obliquely from onemedium to another are hent (refracted) from theircourse,—the degree of bending (refraction) depend-ing upon the density, or rarity of the medium. T
. First lessons in reality, or, The psychical basis of physical health. ght of the True War-rior. A Warrior capable of bearing and hurling alance. I, therefore, turn to the Staff with which Istarted. This conclusion is, after all, only anotherbeginning. The Ray of Light is now my Lance,armed with which I continue my spiral and unend-ing course in Reality. APPENDIX. OUTLINE LESSON IN OPTICS. I. Refraction. Rays of light in passing* obliquely from onemedium to another are hent (refracted) from theircourse,—the degree of bending (refraction) depend-ing upon the density, or rarity of the medium. Thus in passing into a medium of greater density(e. g., from air to water), rays will be bent towards aperpendicular. But in passing from a denser to ararer medium (e. g., from water to air), they willbe hmt from a perpendicular towards a horizontal. (a.) Let A B re-present a surface ofwater, then the per-pendicular ray D Cwill pass to D E. B (*.) But the ob-lique ray F C, in-stead of passing toF I will be bent at M C and pass to F G,or towards the per-pendicular. H.
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