Question

Arrange the colours of VIBGYOR in the increasing order of their refractive indices ​

Answer 1

The colours of VIBGYOR arranged in the increasing order of their refractive indices will be Red < Orange < Yellow < Green < Blue < Indigo < Violet .

• The refractive index of a particular colour is the reciprocal of it's wavelength.
• Hence, more the wavelength, lesser will be the refractive index.
• When we compare the wavelengths of the colours, it is found out that Red has the largest wavelength and Violet has the shortest.
• In this way, the refractive index of red will be the least and violet will be the highest.
• Rest of the colours are arranged accordingly.

Answer 2

Answer:

Red<Orange<Yellow <Green <Blue <Indigo< Violet