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