SI Base Quantities and UnitsMetric(SI) PrefixesChapter1:LengthMassTimeVector Addition(head to tail)Vector addition(by components)Vector MultiplicationRoyal Academy: Nobel Prize 2005Frequency Comb ApparatusIon crystalSI Base Quantities and UnitsMetric(SI) PrefixesChapter1:Length1m 10-7 of the distance from the equator to the pole1m = length of the path traveled by light in vacuum during the time interval of 1/299,792,458 of a second1kg = mass of the platinum-iridium cylinder in Paris 1u = 1.6605 10-27kg ( unified atomic mass unit) MassTime1s = 1/24*60*60 day=1/86400 day 1s = time required for 9,192,631,720 periods of radiation of the Cs-atomVector Addition(head to tail)The 3 vectors Vi can be added by any order to form VRVR= (V1+ V2)+V3 VR= V1+(V2+V3)Vector addition(by components)Components are projections along the axisFind components by trigonometryxyyxyyyxxxVVVVVVVVVVVtan2222121Scalar product Vector product Vector MultiplicationCABBAABBAsincoskBABAjBABAiBABABBBAAAkjiBAxyyxzxxzyzzyzyxzyx)()()( Royal Academy: Nobel Prize 2005Frequency Comb ApparatusIon crystalFluorescence from stored ions for different degrees of laser coolingFluorescence from stored ions for different degrees of laser
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