Caution
Fill in all cells except the one corresponding to the parameter to be calculated.
Choose all parameters unit.
n can be either a numeric value or the reference of a glass from the catalog. If a reference of a glass is selected, the calculation considers the refraction index of this glass at the generic wavelength lam defined in the page accessible by the general parameters/wavelength link.
All parameters are positive.
Positive direction is according to the sense of the horizontal arrow provided for this purpose..