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