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