Consider an electromagnetic wave propagating through a region of empty space. Ho

Question

Consider an electromagnetic wave propagating through a region of empty space. How is the energy density of the wave partitioned between the electric and magnetic fields?

1.The energy density of an electromagnetic wave is 25% in the magnetic field and 75% in the electric field. 2.The energy density of an electromagnetic wave is equally divided between the magnetic and electric fields. 3.The energy density of an electromagnetic wave is entirely in the magnetic field. 4.The energy density of an electromagnetic wave is 25% in the electric field and 75% in the magnetic field. 5. The energy density of an electromagnetic wave is entirely in the electric field

Explanation / Answer

here,

2)

equally divided between the electric and the magnetic field

An electromagnetic wave has both electric and magnetic fields, so the total energy density associated with an electromagnetic wave is:

U = 1/2 0 *E^2 + 1/2 * B^2 l u0

the energy density of the wave be u

electric feild , E = square root (2u/e0) = sqrt(2u * u0 * c^2)

magnetic feild , B = square root (u *2 * u0)

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---