I don't understand this: According to what modern physicists believe to be true, there is entropy that slowly converts all energy of the universe into heat that cannot do any work. Than this heat is radiated as infrared light into space. Correct? Besides infrared heat radiation, start also produce other spectrums of light and all that goes out into space and escapes the universe for ever, if it doesn't happen to run into planets, stars, dust or other space objects on its way out. Correct? Because of some phenomena (what is the term that is used for it?) the frequency of electromagnetic waves decreases over time as they travel through space and all the light that escapes stars slowly becomes infrared heat radiation. Correct? When frequency of electromagnetic radiation decreases, the energy is lost. Why? Thank you.