Function poynting_vector_kernel 

pub fn poynting_vector_kernel(
    e: &CausalMultiVector<f64>,
    b: &CausalMultiVector<f64>,
) -> Result<CausalMultiVector<f64>, PhysicsError>

Calculates the Poynting Vector (Energy Flux): $S = E \times B$.

Uses the outer product $E \wedge B$ to represent flux as a bivector.

Arguments

• e - Electric field vector $E$.
• b - Magnetic field vector $B$.

Returns

• Result<CausalMultiVector<f64>, PhysicsError> - Poynting vector (as bivector).