A color television tube generate some X-rays when electron beam strikes the screen. What is the shortest wavelength of these X-rays, if a 30.0kev potential is used to accelerate the electrons

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up