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