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