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 x 10-5 kg m/s. (c) 108 x 104 kg m/s. (b) 36 x 104 kg m/s. (d) 1.08 x 107 kg m/s.
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