Period of radio wave 10 -6
Period of sound wave 10 -3
Wink on an eye 10 -1
Travel time of light from moon to earth 10 0
Travel time of light from sun to earth 10 2
Rotation period of the earth 10 5
Revolution period of the earth 10 7
Average human life span 10 9
Age of Egyptian pyramids 10 11
Time since dinosaur extinction 10 15
Age of Universe 10 17
Accuracy and Precision of Instruments o
o
o
Any uncertainty resulting from measurement by a measuring instrument is called error . They can be systematic or random .
Accuracy of a measurement is how close the measured value is to the true value .
Precision is the resolution or closeness of a series of measurements of a same quantity under similar conditions .