An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 10^8 W / m^2 falls normally on the object and it is…

An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity $\displaystyle 6 \times 10^8 \mathrm{~W} / \mathrm{m}^2$ falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space $\displaystyle =3 \times 10^8 \mathrm{~m} / \mathrm{s}$ ) :