Answer :

The speed of light v in a medium of refractive index n is given by:
where c is the speed of light in vacuum. Now, each colour has different refractive index in a medium. Thus, they have different speeds (except in vacuum). As the relation between speed and refractive index is inverse, the first colour to emerge should have the lowest refractive index. Red has the lowest refractive index. Hence, option (d) is correct.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

A. A ray of lightPhysics - Board Papers

A ray PQ incidentPhysics - Board Papers

Calculate the radPhysics - Board Papers

Draw a ray diagraPhysics - Exemplar

Between the primaPhysics - Exemplar

The phenomena invPhysics - Exemplar

A passenger in anPhysics - Exemplar