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