• The term. “dimension” connotes the defining characteris)ics of an’ entity.
• .The “unit” is a basis for quantification of the entity. For example, length is a diniension where as centimeter-is a unit of length, time is a dimension and the second is a unit of time.
Units and, standards
Dimensions
System of Units
Anum’ber of systemsofunits are in use .since 16th centu.ry. The important systems of unitsaro
