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