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