Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

This effect was incorrectly explained by Bohr-Kramers-Slater theory, and the relativistic formula for it is a function of a parameter, epsilon, defined as Planck's constant times the frequency divided by the mass of an electron times speed of light squared. The Sunyaev-Zeldovich effect applies its inverse effect to cosmic microwave background radiation photons gaining energy when they travel through a hot electron cloud, and its above differential cross-section is given by the Klein-Nishina formula. The most likely interaction between an X-ray and soft tissue, FTP, name this effect in which a photon loses energy as it scatters off of a single electron, named for an American Nobel-winning physicist.
Science