Physics - Unit & Dimension Question with Solution | TestHub

Solid angle $d\Omega =\frac{dA}{r^2}$ has dimensions $\left[{\mathrm{M}}^0{\mathrm{L}}^0{\mathrm{T}}^0\right]$ Strain $=\frac{\Delta l}{l}$ has dimensions $\left[{\mathrm{M}}^0{\mathrm{L}}^0{\mathrm{T}}^0\right]$ Angle measured in radians is also dimensionless $\left[{\mathrm{M}}^0{\mathrm{L}}^{\circ }{\mathrm{T}}^0\right]$ $\theta =\frac{I}{r}$