Light with an energy flux of falls normally on a non-reflecting surface of area

PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

Light with an energy flux of

20\text{ W cm}^{-2}

falls normally on a non-reflecting surface of area

30\text{ cm}^2

. The total momentum delivered for complete absorption during

30\text{ min}

is (1)

36\times10^{-5}\text{ kg m s}^{-1}

(2)

36\times10^{-4}\text{ kg m s}^{-1}

(3)

1.08\times10^4\text{ kg m s}^{-1}

(4)

1.08\times10^7\text{ kg m s}^{-1}