Experts, n21 is written as n2/n1 OR n1/n2 ?
Dear Student,
n21= n2/n1
Which means that refractive index of a medium 2 with respect to medium1 is equal to refractive index of medium2 divided by refractive index of medium 1.
Regards
n21= n2/n1
Which means that refractive index of a medium 2 with respect to medium1 is equal to refractive index of medium2 divided by refractive index of medium 1.
Regards