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