Right answer:
The Absolute Refractive index
is the quotient of the speed of light in vacuum
and the speed of light in the medium whose index is calculated
, as shown in the expression below:
(1)
This is a dimensionless value.
If we know that:
is the refractive index in vacuum
is the refractive index in the liquid
We can use equation (1), with the values of
and
to calculate
, which is the velocity of light in this medium:
(2)
(3)
(4)
Finally:
>>>>This is the speed of light in the liquid.
Therefore the correct option is c.