, if the ray bends toward the normal), the
speed of the light wave in the second medium (v2) will be
less then the speed of the light wave in the first medium
(v1) This prediction is opposite to the prediction from
the corpuscular model of light and as later experiments
showed, the prediction of the wave theory is correct Now,
if c represents the speed of light in vacuum, then,
1
1
c
n
=v
(10 4)
and
n2 = 
2
vc
(10