Question
Sat February 11, 2012 By: Manas Khare

WHAT IS REFRACTIVE INDEX , not absolute refractive index or relative refractive index?

Expert Reply
Sat February 11, 2012
Absolute RI is the RI of the medium with respect to the vaccum and relative RI is is with respect to an y other medium.
 
RI  shows that in different medium light travells with different speeds.
 
Light travells with maximum speed in vaccum and that is 3x108 m/s.
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