106
Index
Larmor : action of magnetism on light, 112.
Lens : formation of image by, 26.
Leverrier: discovery of Uranus, 24.
Linear measurements : attainable accuracy in, 25.
Lorentz: action of magnetism on light, 112; aberration, 156.
Magnetism : action on light, 107.
Magnification : produced by lens, 27 ; loss of light in, 27; of fringes by interferometer, 32.
Manometric capsule, 10.
Mars, 128.
Maxwell : aberration, 156.
Mercury : analysis of radiations of, 80.
Meter : manufacture of, 87; value in waves of cadmium light, 104.
Microscope : efficiency of, 25; limit of resolution of, 30.
Molecules: complexity of, shown by spectrum, 82.
Morley : measurement of coefficient of expansion, 55.
Moving media: effect on velocity of light, 151.
Music : color, 2.
Newton: corpuscular theory, 45; spectrum, 60.
Objective: relation to size of diffraction pattern, 30.
Pendulum : motion of, 6; as standard of length, 86.
Period, 6.
Phase : defined, 7; loss of by reflection, 16.
Poisson: diffraction, 21.
Polarization, 110.
Quincke: interference of sound, 9.
Rayleigh : diffraction of sound, 21; discovery of Argon, 24.
Reflection : change of phase on, 16.
Refraction : comparison of theories of, 47; index of, 50; measurement of index of, 51.
Resolution: of telescope, 29,130; of microscope, 30; of spectroscope, 62; of grating, 121; of echelon, 125.
Revolving mirror, 48.
Ripples: interference of on surface of mercury, 11.
Rogers: measurement of coefficient of expansion, 55.
Ruskin, 1.
Saturn, 128.
Screw : testing with interferometer, 57.
Sensitive flame, 19.
Simple harmonic motion, 6; curve, 7.
Sine curve, 7.
Slit: diffraction produced by, 22.
Soap film : colors of, 14.
Sodium : spectrum of, 61: distance between lines a standard of measurement, 62; distance between lines of, 66; analysis of radiations of, 78; action of magnetism on radiations of, 107.
Sound waves : interference of, 9; diffraction of, 19; shadow produced by, 20.
Source of light : distribution of, 75.
Spectral lines: structure of, 62; analysis of with interferometer, 73.
Spectrum, 60; of sodium, 61, 78; of hydrogen, 78; of thallium, 79; of mercury, 80; of cadmium, 81; order of, 121.
Standards of length, 86.
Star discs : size of, 143.
Struve: Jupiter’s satellites, 142.
Telescope: efficiency of, 25; limit of resolution of, 29,130.
Thallium : analysis of radiations of, 79.
Tuning-forks : beats formed by, 12.
Undulatory theory, 44.
Uranus: discovery of, 24.
Vacuum tubes : as sources of light, 75.
Velocity: of wave motion, 8, 146; of light, 146.
Visibility : defined, 68; curves with the interferometer, 70; with the double slit, 139.
Vortex theory, 161.
Wavelength: definition of, 7; measurement of, 17; as standard of length, 84.
Wave motion, 3; kinetic model of, 4; Kelvin’s dynamic model of, 5; propagation of, 7.
Wheatstone: velocity of light, 48.
Young : interference, 22.
Zeeman : action of magnetism on light x 107.
Zinc : spectrum of, 62.
PLATK I
1