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Astro*Dictionary
by Michael Erlewine

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1 article for
"Index of Refraction"

Index of Refraction [Astro*Index]

The ratio of the velocity of light in a vacuum to its velocity in a medium:
IR = vel. in vacuum / vel. in medium.

See also:
♦ Light, Velocity of

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