^What is a Tensor?
^What is a Tensor?
A physical quantities which have no specified direction but different values in different directions are called tensors.
Stress, Strain, Density, dielectric constant, refractive index, electrical conductivity, electrical resistivity, moment of inertia etc are tensors. These quantities are taken as tensors at microscopic level & scalars macroscopically.
Following practical units of length are commonly used:
