Precision Engineering Division
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  ENGINEERING METROLOGY TOOLBOX  
HomeRefractive Index of AirElasticTemperaturePublications
 Refractive Index of Air Calculator 
 Based on Modified Edlén Equation 

Refractive Index of Air Calculator is a web-based tool for calculating the index of refraction of air and wavelength of light in air as a function of various input parameters, using the Ciddor Equation or a modified version of the Edlén Equation.

Index of Refraction of Air
Jack A. Stone and Jay H. Zimmerman

Vacuum Wavelength and Ambient Conditions
Based on Modified Edlén Equation

InputAmount
Vacuum Wavelength:
Air Temperature:
Atmospheric Pressure:
Air Humidity:
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Web Site Home: Engineering Metrology Toolbox
Technical Inquiries: Ted Doiron, Group Leader
Engineering Metrology
Precision Engineering Division
Manufacturing Engineering Laboratory
NIST, 100 Bureau Drive, Stop 8211, Gaithersburg, MD 20899-8211

NIST / MEL / Precision Engineering Division

NIST Program Questions: Public Inquires Unit
(301) 975-NIST (6478) TTY (301) 975-8295
NIST, 100 Bureau Drive, Stop 3460, Gaithersburg, MD 20899-3460
Technical Web Site Questions: Jay Zimmerman
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Date Created: Wednesday, November 22, 2000
Last Updated: Wednesday, November 24, 2004