Physics for IGCSE & O level - Rays And Waves (Section 3 - No. 26)
What is the speed of light in a medium with a refractive index of 2.0?
600,000 km/s
300,000 km/s
150,000 km/s
75,000 km/s
Explication
Speed of light in the medium = 300,000km/s / refractive index.