Solution: Sinusoidal electromagnetic waves from a radio station process pass perpendicularly through an open window that has area 0.400 m2. The intensity of the wave is constant over the area of the window. The wave carries 0.800 J of energy through the window in 5.00 s. (Note: ε0 = 8.854 x 10-12 C2/N•m2 and μ0 = 4π x 10-7 T•m/A) What is the intensity of the wave at the window?

Problem

Sinusoidal electromagnetic waves from a radio station process pass perpendicularly through an open window that has area 0.400 m2. The intensity of the wave is constant over the area of the window. The wave carries 0.800 J of energy through the window in 5.00 s. (Note: ε0 = 8.854 x 10-12 C2/N•m2 and μ0 = 4π x 10-7 T•m/A) What is the intensity of the wave at the window?