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