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