An electromagnetic wave moving through free space at 3 ms-1 has a frequency if 4.62 Hz. Find the wavelength of this wave Please help its due today will mark brainless ‼️‼️‼️‼️‼️

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