How much energy is transported across a 1.25 cm2 area per hour by an EM wave whose E field has an rms strength of 38.5 mV/m

The energy transported per hour is 4.92 x 10⁻¹⁰ J.

Explanation:

Given;

root mean square strength of the field, = 38.5 mV/m

area per hour, A = 1.25 cm²/hr = 1.25 x 10⁻⁴ m²/hr

The peak strength of the field is given by;

E₀ = √2

E₀ = (38.5 mV)√2

E₀ = 54.45 mV

the average intensity is given by;

Energy transported per hour is given by;

Therefore, the energy transported per hour is 4.92 x 10⁻¹⁰ J.