# Poynting Vector Formula

Poynting Vector represents the direction of energy-flux density in an electromagnetic field

Poynting Vector formula is represented by

$\underset{S}\rightarrow =\frac{1}{\mu _{0}}(\underset{E}\rightarrow \times \underset{B}\rightarrow )$
$S =\frac{1}{\mu_{0}}EBsin\theta$
Where,

S = Poynting Vector

E = Electric Field

B = Magnetic Field

μ 0= vacuum permeability = 1.257 x 10 6 henry/ meter

Poynting Vector is the cross product of electric and magnetic fields.