Does heat affect light?
Yes, very much so. The more heat and object produces, the more light it can give off. The problem is, is that most heat that is given off is in forms of light, just light we cannot see. That light would be known as infrared. Look at our sun. Heat is light, light is heat. They work together, they don’t necessarily effect one another. The only thing I can think of is if something gets really hot, you get evaporation rising up and heat in waves. Then if you look out in the distance on a HOT day, you can see light twist and bend, that would be a mirage. TO YOUR UPDATE:: As light passes through a vacuum it wouldn’t be effected by just ‘hot or cold’ because as mentioned earlier, the reason for heat is light and the reason for light is heat; they work together, so if it passes through a hot spot in space is highly unlikely because space IS a vacuum, the only spots that would become hot would be in black dwarfs, suns, or planets, MAYBE an ansteroid if its ‘hot off of the press’. So light would