A) a field B) the atmosphere C) heat D) a material medium
A) artificial lights B) the high energy of the Sun C) the energy of distant stars D) a vacuum
A) motion of a medium caused by EM waves B) energy that moves as EM waves C) conversion of EM waves into kinetic energy D) speed of EM waves in a vacuum
A) decreases as the waves spread out B) increases as the amount of energy increases C) always remains constant D) depends on the source of the waves
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) x-rays B) radio waves C) ultraviolet light D) microwaves
A) radio waves B) x-rays C) gamma rays D) ultraviolet light
A) microwaves B) ultraviolet light C) x-rays D) radio waves
A) ultraviolet light B) radio waves C) microwaves D) infrared light
A) radio waves B) ultraviolet light C) microwaves D) visible light
A) microwaves B) ultraviolet light C) x-rays D) radio waves
A) x-rays B) microwaves C) radio waves D) ultraviolet light |