1. The problem statement, all variables and given/known data A Roentgen tube produces radiation with minimal wavelength. (λM) De-Broglie Wavelength of electrons reaching Anode is λE. Assuming electrons are not relativistic, what is the proper relation between wavelengths λM, λE and Compton wavelength (λC) 2. Relevant equations λE=h/p λC=h/mc I am not sure, minimal wavelength - what that is ? This is multiple answers question, but any of the answers don't make sense to me. 3. The attempt at a solution I think that relation between λC and λM can be wrote down through Compton effect: λC=λE-λM=h/mc(1-cosα) However, there is no angle given, so I cam confused about what to do? Thank you in advance.