Function hydrogen_energy_level_ev 

pub fn hydrogen_energy_level_ev(n: u32) -> Option<f64>

Computes the hydrogen energy level in electron volts using E_n = -Ry / n^2.

Returns None when n == 0 or when the computed result is not finite.

Examples

use use_quantum::{RYDBERG_ENERGY_EV, hydrogen_energy_level_ev};

assert_eq!(hydrogen_energy_level_ev(1), Some(-RYDBERG_ENERGY_EV));