Question

the velocity of light in vaccum is 3,00,000 km/sec and in diamond the velocity of light is 1,24,000 km/sec then find the refractive index of diamond

Answer 1

refractive index=speed of light in medium /speed of light in vacuum

so answr=124000/300000=0.41

Answer 2

Refractive index = Velocity of light in medium / Velocity of light in Vaccum = 124000/300000 = 0.413