Q8.3Multiple choice
Light with an energy flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm2. the total momentum delivered (for complete absorption) during 30 minutes is
- (a)36 × 10–5 kg m/s.
- (b)36 × 10–4 kg m/s.
- (c)108 × 104 kg m/s.
- (d)1.08 × 107 kg m/s.