index of refraction
First Known Use of INDEX OF REFRACTION
index of refraction noun (Medical Dictionary)
: the ratio of the speed of radiation (as light) in one medium (as a vacuum) to that in another medium—called also refractive index
Learn More About INDEX OF REFRACTION
Seen & Heard
What made you want to look up index of refraction? Please tell us where you read or heard it (including the quote, if possible).