Essentials of physicsW.B. Saunders, 1896 - 319 pages |
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Page 141
... Light itself is invisible . You can only trace the path of a sun- beam by the floating particles of dust . If the eye is placed in its path , you become aware of its presence , not by seeing the light , but by seeing the object which ...
... Light itself is invisible . You can only trace the path of a sun- beam by the floating particles of dust . If the eye is placed in its path , you become aware of its presence , not by seeing the light , but by seeing the object which ...
Page 154
... light ? Light falling upon an opaque body separates into three parts : one is reflected regularly ; another irregularly - i . e . in all directions ; and a third is absorbed . The irregularly reflected light is called scattered or diffused ...
... light ? Light falling upon an opaque body separates into three parts : one is reflected regularly ; another irregularly - i . e . in all directions ; and a third is absorbed . The irregularly reflected light is called scattered or diffused ...
Page 200
... light undergoes when it passes the edge of a body . The luminous rays appear to become bent and penetrate the shadows . Let monochromatic light in passing an aperture cross a razor edge . One part of the luminous cone is intercepted ...
... light undergoes when it passes the edge of a body . The luminous rays appear to become bent and penetrate the shadows . Let monochromatic light in passing an aperture cross a razor edge . One part of the luminous cone is intercepted ...
Contents
BOOK I | 17 |
The Attractions of Matter | 26 |
Matter Force and Motion | 33 |
37 other sections not shown
Common terms and phrases
acid ampères angle aperture armature attraction axis barometer battery body called camera carbon cell chemical ciliary muscle circuit coil collodion colors concave condensing conductor connected containing convex convex lens cornea crystalline lens Describe direction disk dynamo electricity electro-magnet electrolysis eye-piece film focus force galvanometer gases gelatin glass gun-cotton H₂SO heat heliostat hydrometer induced currents induction instrument intensity iron Jefferson Medical College Leclanché cell lens lenses Leyden jar light liquid luminous machine magnet magnified Medical metal microscope mirror molecules motion needle negative object optic paper paper negatives parallel passes Philadelphia picture placed platinum polarized pole presbyopia pressure principle prints prism produced quantity rays reflected refraction resistance retina silver solid sound spectrum Spherical aberration substances surface Surgery telescope temperature Text-Book thermometer tion transmitted tube vapor velocity vessel vibrations vitreous humor voltaic volume weight wire