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Which among the following is not regarded as an elastic constant of a material?

a: Young's Modulus Explanation

Explanation

b: Rigidity Modulus Explanation

Explanation

c: Refractive index Explanation

Explanation

d: Poisson's Ratio Explanation

Explanation

Young's Modulus has:

a: Unit of Force Explanation

Explanation

b: No unit Explanation

Explanation

c: Unit of Pressure Explanation

Explanation

d: None of these Explanation

Explanation

Cornu's Method