Question

Which of the following is a dimensional constant?

• A. Relative density
• B. Gravitational constant
• C. Refractive index
• D. Poisson ratio

Answer 1

Answer: (B)

Gravitational constant

Answer 2

Relative density, refractive index and Poisson ratio all the three are ratios, therefore they are dimensionless constants. Only universal gravitational constant has dimension ${[M^{-1}L^3T^2]}$. Others have no dimensions.