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