In a polychromatic light, such as white light, the different wavelengths of light are not entangled with each other. Instead, they coexist as separate but closely spaced components.
White light is a combination of multiple wavelengths from across the visible spectrum. When white light passes through a prism or diffraction grating, it gets dispersed into its constituent colors, which are the individual wavelengths that make up the light. This dispersion occurs because each wavelength bends or refracts at a slightly different angle due to the variation in the index of refraction with wavelength.
The resulting pattern shows a continuous spread of colors from red to violet, which is known as a spectrum. Each color in the spectrum corresponds to a specific wavelength of light. These wavelengths are not physically entangled or intertwined with each other but are distinct and separate components of the overall light.
So, in the case of white light, the different wavelengths are present simultaneously but are not entangled together. They are separate entities that, when combined, create the sensation of white light to our eyes.