Refractive index of Na (Sodium)

Optical constants of Na (Sodium)
Althoff and Hertz 1967: n,k 2.25–10.2 µm

Wavelength: µm

(2.25–10.15)

Complex refractive index (n+ik)[ i ]

Derived optical constants

References

R. Althoff and J. H. Hertz. Measurement of the optical constants of Na and K in the range of wavelength from 2.5 to 10 μ, Infrared Phys. 7, 11-16 (1967)

Data

[CSV - comma separated] [TXT - tab separated] [Full database record]

Optical transmission calculator

Wavelength: µm
Thickness:
Calculation method:

Transmittance[ i ]

T =

LogX LogY eV

Reflection calculator

Wavelength: µm
Angle of incidence (0~90°):
Direction: in out

Reflectance[ i ]

P-polarized

R_P =

S-polarized

R_S =

Non-polarized (Rp+Rs)/2

R =

R_P R_S R LogY

Reflection phase[ i ]

ɸ_P = °
ɸ_S = °

Brewster's angle[ i ]

θ_B = °

Critical angle[ i ] [ i ]

θ_C = °

INFO

Sodium, Na

Sodium (Na) is a soft, silvery-white, highly reactive alkali metal. Due to its high reactivity, it doesn't exist freely in nature and is usually found in the form of salts, like sodium chloride (NaCl or table salt). Sodium reacts vigorously with water, producing heat and forming sodium hydroxide and hydrogen gas. Optically, sodium's emission line in the yellow range (specifically around 589 nm) is well-known. This bright yellow "sodium line" emission is used in sodium vapor lamps, which are a type of gas discharge lamp. These lamps are used in street lighting and give off a characteristic yellow glow. The sodium doublet emission in the yellow range can also be used as a calibration source in spectroscopy.

RefractiveIndex.INFO

Optical constants of Na (Sodium)
Althoff and Hertz 1967: n,k 2.25–10.2 µm

Complex refractive index (n+ik)[ i ]

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

References

Data

Optical transmission calculator

Transmittance[ i ]

Reflection calculator

Reflectance[ i ]

P-polarized

S-polarized

Non-polarized (Rp+Rs)/2

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

INFO

Sodium, Na

External links

Optical constants of Na (Sodium)Althoff and Hertz 1967: n,k 2.25–10.2 µm

Complex refractive index (n+ik)[ i ]

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

References

Data

Optical transmission calculator

Transmittance[ i ]

Reflection calculator

Reflectance[ i ]

P-polarized

S-polarized

Non-polarized (Rp+Rs)/2

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

INFO

Sodium, Na

External links

Optical constants of Na (Sodium)
Althoff and Hertz 1967: n,k 2.25–10.2 µm