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Optical constants of CH4 (Methane)
Loria 1909: Gas at 0 °C; n 0.529–0.659 µm

Wavelength: µm
 (0.529–0.6585)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n=1.00042607+6.1396687\text{×}10^{-6}λ^{-2}$$

Conditions & Spec sheet

n_is_absolute: true
temperature: 0 °C
pressure: 101325 Pa

Comments

Standard conditions. 0 °C, 760 torr (101.325 kPa).

References

S. Loria Über die Dispersion des Lichtes in gasförmigen Kohlenwasserstoffen. Annalen der Physik 334, 605-622 (1909) (in German).

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

Methane, CH4

Methane (CH4) is the simplest alkane and is a colorless, odorless gas under standard conditions. It is the primary constituent of natural gas and is notable for being a potent greenhouse gas. In the environment, methane is produced during the anaerobic decomposition of organic matter, such as in wetlands, ruminant digestion, and landfills. It can also be found in various industrial processes and is used as a fuel for heating and electricity generation. In the realm of optics, methane's refractive properties might be of interest, especially when considering its potential presence in gaseous atmospheres of extraterrestrial bodies.

Other name

Tetrahydridocarbon

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