Is your textbook the kind of idealized object (described in section on radiation laws) that absorbs all the radiation falling on it? explain. how about the black sweater worn by one of your classmates?

In the textbook the kind of idealized object that described in section on radiation laws that it absorbs all the radiation falling for it because it is not giving off any radiation on its own. And about the black sweater worn by one of your classmates it goes the same.