A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is a) blue b) green c) violet d) red
Correct option is D) Red would be the first colour to emerge ∵ c=vλ and v is constant during refraction so c∝λ. The velocity of red colour is maximum in glass as the λR<λV
