Answer:
1.6 x 10⁻⁶ J/m³
Explanation:
I = Intensity of electromagnetic radiation = 475 Wm⁻²
U = average total energy density of electromagnetic radiation
c = speed of electromagnetic radiation = 3 x 10⁸ m/s
Intensity of electromagnetic radiation is given as
[tex]I = Uc[/tex]
Inserting the values
[tex]475 = U (3\times 10^{8})[/tex]
U = 1.6 x 10⁻⁶ J/m³
