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