Light and Electricity: Notes of Two Courses of Lectures Before the Royal Institution of Great BritainAppleton, 1903 - 194 pages |
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Common terms and phrases
aberration of light action angle of incidence aperture atoms attraction augmented axis bands battery body bright cable called caused centre circuit Cloth coil colors conductor core crystal dark Diamagnetism direction discharge distance double refraction duced earth effect elasticity electric current electrified electro-magnet electrode emission theory employed ether ether waves Faraday film flame force galvanometer glass heat helix Hence hydrogen Iceland spar illuminated Illustrations inch index of refraction intensity iron lens lines liquid luminous marginal rays metals mirror motion 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 26 - image in a plane mirror appears as far behind the mirror as the object is in front of it. This follows immediately from the law which announces the equality of the angles of incidence and
Page 159 - and the whole surface 128,000 square inches. This battery, when the cells were filled with 60 parts of water mixed with one part of nitric acid, and one part of sulphuric acid, afforded a scries of brilliant and impressive effects. When pieces of charcoal about an inch long and onesixth of an inch
Page 82 - from star only in the grouping and arrangement of the numerous fine lines by which their spectra are crossed. 324. The dark absorption lines are strongest in the spectra of yellow and red stars. In white stars the lines, though equally numerous, are very poor and faint. 325. A comparison of the spectra of stars of different