Light with an energy flux of 500 kW/m2 falls for 5 minutes at normal incidence on a non-reflecting circular surface with a radius of 10 cm. The total momentum delivered to this surface has a magnitude of ______.
1
25 π × 10-3 kg m s-1
2
5 π × 10-3 kg m s-1
3
7.5 π × 10-3 kg m s-1
4
8.3 π × 10-3 kg m s-1