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SI Base Quantities and UnitsPowerPoint Presentation

SI Base Quantities and Units

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### Ion crystal

Chapter1:Length

1m 10-7 of the distance from the equator to the pole

1m = length of the path traveled by light in vacuum during the time interval of 1/299,792,458 of a second

Mass

1kg = mass of the platinum-iridium cylinder in Paris

1u = 1.6605 10-27kg ( unified atomic mass unit)

Time

1s = 1/24*60*60 day=1/86400 day

1s = time required for 9,192,631,720 periods of radiation of the Cs-atom

Vector Addition(head to tail)

The 3 vectors Vi can be added by any order to form VR

VR= (V1+ V2)+V3

VR= V1+(V2+V3)

Vector addition(by components)

Components are projections along the axis

Find components by trigonometry

Fluorescence from stored ions for different degrees

of laser cooling

Fluorescence from stored ions for different degrees

of laser cooling

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