LIGHT AND ELECTRICITY: NOTES OF TWO COURSES OF LECTURES BEFORE THE ROYAL INSTITUTION OF GREAT BRITAIN |
Common terms and phrases
aberration of light angle of incidence aperture atoms attraction augmented axis bands battery body bright cable called caused centre circuit coil colors conductor core crystal dark diamagnetic direction discharge distance double refraction duced earth elasticity electric current electrified electro-magnet electrode emission theory employed ether ether waves Faraday film flame force formed galvanometer glass heat helix Hence hydrogen Iceland spar illuminated index of refraction intensity iron lens lines liquid luminous magnetic marginal rays metals mirror motion needle object oblique obtained optic oxygen parallel particles passes perpendicular phenomena placed plane of vibration plate platinum polarized poles portion positive primary principal focus prism produce rays reflected refractive index repelled retardation retina rings rotation round screen secondary shadow slit solar spark spectrum spherical square substance surface thickness tion tourmaline transmitted undulation vapor velocity of light voltaic current waves white light wire zinc
Popular passages
Page 35 - It may also be defined as the sine of the angle of incidence divided by the sine of the angle of refraction, as light passes from air into the substance.
Page 26 - Why the image is seen as far behind the mirror as the object is in front of it.— Let AB be an arrow held Fig.
Page 104 - In its case the sine of the angle of incidence is to the sine of the angle of refraction...
Page 160 - ... a common candle ; quartz, the sapphire, magnesia, lime, all entered into fusion ; fragments of diamond and points of charcoal and plumbago rapidly disappeared and seemed to evaporate in it, even when the connection was made in a receiver exhausted by the air-pump ; but there was no evidence of their having previously undergone fusion.
Page 60 - FIRST ESTABLISHED THE UNDULATORY THEORY OF LIGHT, AND FIRST PENETRATED THE OBSCURITY WHICH HAD VEILED FOR AGES THE HIEROGLYPHICS OF EGYPT.