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Light and the Atom
Light from the Stars
5 other sections not shown
absorption aether amplifier amplitude angle arrangement astronomers atoms axis basic bright calculate carrier wave cavity resonator centre Chapter coherent radiation colour corresponding crystal device diffraction grating diffraction pattern direction distance Doppler effect electric electromagnetic spectrum electromagnetic waves electron resonance emitted energy levels excited far-field region frequency give heat Herschel hole infra-red intensity interstellar klystron large number laser light waves lines of force magnetic field maser measure metal metres microwave microwave spectroscopy million mirror molecules motion Newton nucleus observations obtained orbit oscillator particle photograph photons physical plane polarised possible produced pulse radar radio galaxies radio telescope radio waves radio window rays reflected reflector region rotation ruby short wavelength shorter shown in Figure simple sodium solid space spectra speed spin stars stellar stimulated emission structure surface techniques temperature theory tion tube ultra-violet velocity of light vibrations visible waveguide wavelength X-rays