An object is placed in a medium of refractive index 3 . An...

The formula to calculate the radiation pressure is given by

$P = \dfrac{I}{v} . . . \left(1\right)$

Also, the velocity of the electromagnetic wave can be expressed as

$\mu = \dfrac{c}{v} . . . \left(2\right)$

Equations (1) and (2) imply that

$\begin{cases}P & = & \dfrac{I \cdot \mu}{c} \\ & = & \dfrac{6 \times {10}^{8} \times 3}{3 \times {10}^{8}} \\ & = & 6N{m}^{- 2}\end{cases}$