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