Light with an energy flux of 20 W/cm 2 surface has an area of falls on a non-reflecting…
Physics · NEET · NTA Exams — Dual Nature of Matter and Radiation
Light with an energy flux of 20 W/cm2 surface has an area of falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm2 the total momentum delivered (for complete absorp-tion) during 30 minutes is :
- 36 × 10–5 kg m/s
- 36 × 10–4 kg m/s
- 1.08 × 104 kg m/s
- 1.08 × 107 kg m/s
Answer
(B) 36 × 10 –4 kg m/s
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