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