Full set of Notes with Fill-Ins - San Jose State University

Chem 155 Unit 3 Page 71 of 316Properties of Electromagnetic Radiation:Most EM Radiation is polychromatic, i.e. the beam isa mixture of rays of different:frequenciesphasesE.g. incandescent light sources are polychromatic.Another term for polychromatic light: is white light.EM Radiation is monochromatic if all rays haveidentical:E.g. Na-atomic emission lamps are nearlymonochromatic because nearly all of the light is froma single atomic transition that emits at 590nm.White light can be filtered so that it is nearlymonochromatic.Coherence:EM Radiation is coherent if all rays have identical:frequencywavelengthphaseCoherent radiation comes from lasers and exotic lightsources called synchrotrons.Page 71 of 316