Question

A ray of yellow light ( f = 5.09 × 1014 Hz) travels at a speed of 2.04 × 108 meters per second in

Answer 1

As we know that refractive index is given as

$n = \frac{speed \ of \ light \ in \ air}{speed \ of \ light \ in \ medium}$

now we know that

speed of light in medium = $2.04 \times 10^8$ m/s

now refractive index is given as

$n = \frac{3 \times 10^8}{2.04 \times 10^8}$

$n = 1.47$

now we know that refractive index of glycerine is 1.473

So here this material will be GLYCERINE

Answer 2

glycerol or corn oil!!! -----> n=c/v----> (3x10^8) / (2.04x10^8)= 1.47