Physics

Problem

Which of the following correctly expresses the absolute refractive index

n

of a transparent medium in terms of the speed of light

c

in vacuum and the speed

v

of light in the medium? a)

n=\dfrac{v}{c}

n=\left(\dfrac{c}{v}\right)^{2}

n=\dfrac{c}{v}

n=\dfrac{c-v}{v}