Is the word "Ray" related to the Egyptian "Ra"

My Communications professor was quite adamant that the word "radio" could be traced back to the Egyptian word for sun, "ra". Radio comes from the Latin "radius" and I could find no sources that connected radius to ra. In fact, I'm pretty sure that Latin didn't develop out of Egyptian at all, but I could be mistaken. Can anyone offer further insight?

Solution 1:

Ra was the Egyptian Sun god. His name was not spelled Ra, as the language was hieroglyphic Egyptian and various forms of Demotic Egyptian, which didn't have our letters.

Ray comes to English through Old French rai, from Latin radius (spoke).

There is no evidence that the sun ray comes from Ra - there are entirely different languages between them.