You can tell the severe lack of knowledge of light physics in this thread. Heat bends light but does not directly effect it, only mediums effect light in that way, Meaning light refracts and reflects off certain substances)water refracts light mirrors reflect it etc. Meaning technically in OP Kizaru should be able to be defeated by anyone with sword with ease, making him much less impressive of a character,(all of his attacks would reflect off the swords) This would make it so someone like Zoro would be able to absolutely stomp Kizaru, same thing with Yama. Using light physics and the law of reflection he should be able to win without even using his shikai(Im assuming Masaki's powers are light based and he somehow can become light similar to kizaru). I made this post assuming those powers work completely differently than Kizaru's(where in OP it seems physics biology are overlooked in certain points, this is to be expected in fiction however.)Unless Masaki has defied the law of reflection before he loses.
When exactly did you think, that Yama-jii can dodge lasers or other things made of light?