Question about burning/writing blu-rays to disc

[Joshitaka]

I have a .mkv file that I want to burn/write onto BD so I can watch it on my tv like any other blu-ray disc I own. However, someone told me that .mkv isn't the standard file type for this sort of thing. So the question is: if I purchase a blu-ray burner and write the file to a disc, if I put it in my blu-ray player, will it play normally? Or do I need to get some sort of converter software?

This is probably a dumb question, but I don't know a whole lot about this stuff. I don't want to spend money on this project unless I know what the outcome will be. Thanks!