Measurement of Length
Length can be measured using metre scale( 10-3 m to 10 2 m), verniercallipers( 10-4 m) and screw gauge and spherometer( 10-5 m).
Range of Length
Size of object or distance Length( m)
Size of proton 10-15
Size of atomic nucleus 10-14
Length of typical virus 10-8
Wavelength of light 10-7
Thickness of paper 10-4
Height of Mount Everest above sea level 10 4
Radius of earth 10 7
Distance of moon from earth 10 8
Distance of sun from earth 10 11