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