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