Question

What is the average total energy density in electromagnetic radiation that has an intensity of 475 W/m^2?

Answer 1

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

$I = Uc$

Inserting the values

$475 = U (3\times 10^{8})$

U = 1.6 x 10⁻⁶ J/m³