When traveling in outer space, which of the following waves can an astronaut detect in this environment?

What can you increase the strength of an electromagnet by

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)

What is the period of a wave traveling 5 m/s if its wavelength is 20 m/s