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