An object is placed in a medium of refractive index $3$. An electromagnetic wave of intensity $6 \times 10^8 \mathrm{~W} / \mathrm{m}^2$ falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space $=3 \times 10^8 \mathrm{~m} / \mathrm{s}$ ):
  • A$36\  \mathrm{Nm}^{-2}$
  • B $18\  \mathrm{Nm}^{-2}$
  • C$6 \ \mathrm{Nm}^{-2}$
  • D $2\  \mathrm{Nm}^{-2}$
JEE MAIN 2024, Diffcult
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