Velocity of which of the following colours of VIBGYOR is maximum?
Answer & explanation
Correct answer: option 2
The velocity of light in a medium is maximum for that colour for which refractive index is minimum.
Clearly, the velocity of voilet colour of light is minimum in a medium and refractive index of that medium is maximum for violet colour.
Similarly, the velocity of light in a medium is maximum for red colour and refractive index of that medium is minimum for red colour.