Given that the text is nonsense and contains numerous formatting issues, I will rewrite it so that it makes sense while preserving any LaTeX formatting.
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An electric field with an intensity of [tex]$8 \, \text{W/m}^2$[/tex] is parallel to a plane. Determine the amplitude of the electric field. Given: [tex]80 \, \text{W/m}^2[/tex] and [tex]c = 3 \times 10^8 \, \text{m/s}[/tex].
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This version presents a coherent question related to the electric field, preserving the LaTeX format and ensuring clarity.