The intensity is given by:
\[ I = \frac{1}{2} \epsilon_0 c E_0^2 \]
where \( \epsilon_0 \) is the permittivity of free space (\( \epsilon_0 = 8.85 \times 10^{-12} \, \text{F/m} \)) and \( c \) is the speed of light in a vacuum (\( c = 3 \times 10^8 \,
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