A) a field B) a material medium C) the atmosphere D) heat
A) the energy of distant stars B) artificial lights C) the high energy of the Sun D) a vacuum
A) motion of a medium caused by EM waves B) speed of EM waves in a vacuum C) conversion of EM waves into kinetic energy D) energy that moves as EM waves
A) depends on the source of the waves B) always remains constant C) increases as the amount of energy increases D) decreases as the waves spread out
A) are refracted B) pass through the water without interacting with it C) convert electromagnetic energy into heat D) are reflected in many directions
A) microwaves B) radio waves C) ultraviolet light D) x-rays
A) radio waves B) x-rays C) gamma rays D) ultraviolet light
A) x-rays B) microwaves C) ultraviolet light D) radio waves
A) microwaves B) radio waves C) infrared light D) ultraviolet light
A) radio waves B) ultraviolet light C) microwaves D) visible light
A) radio waves B) microwaves C) ultraviolet light D) x-rays
A) radio waves B) x-rays C) ultraviolet light D) microwaves |