- Its symbol is N. A measure of the extent to which a medium will refract a ray. May be expressed as N = (n -1), where n is the refractive index of a given medium.
- symbol N
- Symbol for index of refraction, or refractive index.
- Unusual type of galaxy with extremely bright core, related to Seyfert galaxies and quasars
- prefix nano- or x 10-9
Not what you were looking for?