SSC MTS EXAM

Detailed explanation-1: -Violet light is refracted the most because violet colour has the minimum speed in glass prism.

Detailed explanation-2: -Violet light has a shorter wavelength; hence, it is slowed more than the longer wavelengths of red light. Consequently, violet light is bent the most while red light is bent the least.

Detailed explanation-3: -Thus, violet color has a greater refractive index than red.

Detailed explanation-4: -The refractive index changes inversely with the wavelength. For the given options, the increasing order of the wavelength of the colors is given as violet, green, yellow, and red. Thus, the violet ray has the shortest wavelength. So, it has the highest refractive index.