Question

In glass which colour has greater refractive index, violet or red?

Answer 1

Step 1: The Relation between Refractive Index and Wavelength

1. The refractive index varies with the wavelength of light. As light travels from one medium to another, the frequency does not change. It remains the same.
2. Thus, the refractive index is inversely proportional to the wavelength.

Step 2: Greater Refractive Index

1. Violet color has the lowest wavelength. Hence, the refractive index is maximum for violet color in the glass.
2. Thus, violet color has a greater refractive index than red.