hello everyone.. so I have been doing some studying about black-body and black-boy radiation but I can't seem to really understand them well so I have thought that there might be some things that I would need to have a background of before being able to fully understand these subject and so my question is what are the stuff that I would need to know in order to understand the subjects mentioned earlier?....note that I'm an astronomy student in my second year so I hope this can help you guess what I already know and sorry if my English is bad and finally thanks in advance :)