Question

which has more refractive index red or violet?​

Answer 1

Red light has a longer wavelength than violet light. ... The refractive index of red light in glass is 1.513. The refractive index of violet light is 1.532. This slight difference is enough for the shorter wavelengths of light to be refracted more...

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Answer 2

Answer:

The refractive index is a property of the medium through which light is passing. For a vacuum, the refractive index is 1 for all wavelengths.

Ordinary dielectric transparent media such as glass will have a higher index for blue than for red. (I don’t like to use the term “violet” because it is so easily confused with purple or magenta, which are not pure colors. Violet can be difficult to see and difficult to capture on a video camera or on certain kinds of film.)

The reason for the index change has to do with absorption bands in the glass. There are always some absorption bands in the infrared and in the ultra-violet. In between two absorption bands, the index always increases toward shorter wavelengths. In the absorption band itself, the index will decrease toward shorter wavelengths. This latter phenomenon is called “anomalous dispersion.” (or sometimes “resonant dispersion.”)

Explanation:

Red light has a longer wavelength than violet light. ... The refractive index of red light in glass is 1.513. The refractive index of violet light is 1.532. This slight difference is enough for the shorter wavelengths of light to be refracted more.

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