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