Question

What is the speed of light in a medium of refractive Index 6/5 if it's speed in air is 300000k./s

Answer 1

v of light in medium=v of light  in air/refractive index of that medium

here we have  refractive idex as 6/5

velocity of light in medium=3×10^8/6÷5

velocity of light in medium=5×3×10^8/6

velocity of light in medium=15×10^8/6=2.5×10^8