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