A plane electromagnetic wave of intensity of $10 \mathrm{W}/{\mathrm{m}}^2$ strikes a small mirror of area $20 {\mathrm{cm}}^2$, held perpendicular to the approaching wave. The radiation force on the mirror will be

• A

  $6.6 \times {10}^{-11 }\mathrm{N}$

• B

  $1.33 \times {10}^{-11} \mathrm{N}$

• C

  $1.33 \times {10}^{-10} \mathrm{N}$

• D

  $6.6 \times {10}^{-10} \mathrm{N}$