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