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