Which two of the following five physical parameters have the same dimensions? (1) energy density (2) refractive index (3) dielectric constant (4) Young's modulus (5) magnetic field

Step-by-step solution

(1) Energy density, aligned & = Energy Volume & = [ ML ^2 ~T ⁻² ] [ L ^3 ] = [ ML ⁻¹ ~T ⁻² ] aligned (2) Refractive index hole no dimensions. (3) Dielectric constant has no dimensions. (4) Young's modulus, Y= F l A l = [ MLT ⁻² ][ L ] [ L ^2 ][ L ] = [ ML ⁻¹ ~T ⁻² ] (5) Magnetic field, B= F I l = [ MLT ⁻² ] [ A ][ L ] = [ MT ⁻² ~A ⁻¹ ] Therefore, option (c) is correct.