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