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(A) The intensity $I$ of an electromagnetic wave is given by $I = \frac{1}{2} \varepsilon_0 E_0^2 c = \frac{1}{2} \frac{B_0^2 c}{\mu_0}$.Radiation pre

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$\frac{1}{2} \varepsilon_0 E_0^2$

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(A) The intensity $I$ of an electromagnetic wave is given by $I = \frac{1}{2} \varepsilon_0 E_0^2 c = \frac{1}{2} \frac{B_0^2 c}{\mu_0}$.Radiation pressure $P$ on a totally absorbing surface is defined as the momentum transferred per unit area per unit time,which is given by $P = \frac{I}{c}$.Substituting the expression for intensity,we get $P = \frac{\frac{1}{2} \varepsilon_0 E_0^2 c}{c} = \frac{1}{2} \varepsilon_0 E_0^2$.Thus,the magnitude of the average momentum transferred per unit area and per unit time is $\frac{1}{2} \varepsilon_0 E_0^2$.

Let $E_0$ and $B_0$ denote the amplitude of the electric and magnetic fields of a plane electromagnetic wave in air. The magnitude of the average momentum transferred per unit area and per unit time to a totally absorbing surface is

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