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| def difference_in_wavenumbers(delta_cm, at_nm): | |
| """ | |
| Parameters | |
| ---------- | |
| delta_cm : float | |
| Difference in wavenumbers (cm-1) | |
| at_nm : float | |
| Wavelength (nm) at which `delta_cm` is evaluated. | |
| Returns | |
| ------- | |
| delta_nm : float | |
| Difference in wavelength (nm). | |
| """ | |
| c = 1.0e-02 | |
| x = at_nm * 1.0e-09 | |
| y = x / ((delta_cm / c) * x + 1) | |
| return abs(x - y) * 1.0e+09 |
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