Function poynting_magnitude 

pub fn poynting_magnitude(
    electric_field: f64,
    magnetic_flux_density: f64,
) -> Option<f64>

Computes Poynting magnitude in vacuum using S = EB / μ0.

Inputs are treated as magnitudes.

Examples

use use_electromagnetism::poynting_magnitude;

assert!(poynting_magnitude(10.0, 2.0).unwrap() > 0.0);
assert_eq!(poynting_magnitude(-10.0, 2.0), None);