A) the atmosphere B) a material medium C) heat D) a field
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) conversion of EM waves into kinetic energy D) speed of EM waves in a vacuum
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) are refracted B) are reflected in many directions C) pass through the water without interacting with it D) convert electromagnetic energy into heat
A) ultraviolet light B) radio waves C) x-rays D) microwaves
A) ultraviolet light B) radio waves C) x-rays D) gamma rays
A) microwaves B) ultraviolet light C) radio waves D) x-rays
A) ultraviolet light B) infrared light C) microwaves D) radio waves
A) visible light B) microwaves C) radio waves D) ultraviolet light
A) radio waves B) microwaves C) x-rays D) ultraviolet light
A) ultraviolet light B) radio waves C) x-rays D) microwaves |