The wavelength of violet color is shorter than the wavelength of blue color because the color of light is determined by its wavelength, and violet light has a higher frequency and shorter wavelength compared to blue light.
Light is an electromagnetic wave, and different colors correspond to different wavelengths within the electromagnetic spectrum. The visible spectrum ranges from red, which has the longest wavelength, to violet, which has the shortest wavelength.
The relationship between wavelength and color is based on the phenomenon of dispersion. When white light passes through a prism or is refracted by a droplet of water, it separates into its constituent colors, forming a spectrum. The bending of light waves (refraction) is dependent on the wavelength of the light, causing the different colors to separate.
In this process of dispersion, violet light is refracted more than blue light because it has a shorter wavelength. The shorter wavelength of violet light causes it to bend more when passing through a prism or other refractive medium, resulting in a larger angle of deviation from its original path compared to blue light.
In summary, the wavelength of violet light is shorter than that of blue light because violet light has a higher frequency and higher energy, which correspond to shorter wavelengths within the visible spectrum.