7 horses = 7 colors !!!

It is considered that Isaac newton discovered the light spectrum (light contains 7 colors)  in 1672. Newton set up a prism near his window, and projected a beautiful spectrum 22 feet onto the far wall. Further, to prove that the prism was not coloring the light, he refracted the light back together.

 But .....


In Gita it is said that the lord Sun (surya dev) comes in horse-drawn vehicle which has 7 horses. The 7 horses are the symbol of 7 colors of the light. So before newton demonstrated it Gita had already described that light has 7 colors.