 Other names are sometimes employed for one or both parameters, depending on context.For example, the parameter μ is referred to in fluid dynamics as the dynamic viscosity of a fluid(not the same units); whereas in the context of elasticity, μ is called the shear modulus, and is sometimes denoted by G instead of μ.Typically the notation G is seen paired with the use of Young's modulus, and the notation μ is paired with the use of λ.