The combination that lets several different wavelengths of light travel together is called white light.

Here's why:

* Visible Spectrum: White light is actually a mixture of all the colors of the visible spectrum. These colors are separated by wavelength, with red having the longest wavelength and violet the shortest.

* Additive Mixing: When all the colors of the visible spectrum are combined, our eyes perceive it as white. This is known as additive color mixing.

* Sunlight: A prime example of white light is sunlight. It contains all the colors of the rainbow, which is why we can see a rainbow when sunlight passes through water droplets.

So, while it might seem like white light is a single color, it's actually a combination of many different wavelengths traveling together.