question_answer 46)

                  Photon is quantum of radiation with energy \[E=hv\] where v is frequency and h is Planck?s constant. The dimensions of h are the same as that of                 (a) Linear impulse            (b) Angular impulse                 (c) Linear momentum    (d) Angular momentum                

Answer:

                  (b), (d) \[h=\frac{E}{\nu }=\frac{M{{L}^{2}}{{T}^{-2}}}{{{T}^{-1}}}=[M{{L}^{2}}{{T}^{-1}}]\]                 = dimensions of angular momentum.                 Also Angular Impulse = change in angular momentum.